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ETHNOPHARMACOLOGICAL RELEVANCE: Lobostemon fruticosus (L.) H.Buek is a perennial and woody shrub of the Boraginaceae family, found in the Cape region of South Africa. The leaves and twigs are used to treat dermatological conditions such as wounds, burns, ringworm, erysipelas and eczema. Anti-inflammatory, antibacterial, antiviral and anti-proliferative activities of L. fruticosus have been reported. However, there is a void in research which reports on the wound healing properties of this plant. AIM OF THE STUDY: Aligned with the traditional use of L. fruticosus, our study aimed to use in vitro and in vivo bioassays to confirm the wound healing potential of the plant. MATERIALS AND METHODS: An aqueous methanol extract (80% v/v) of L. fruticosus was prepared using a sample collected from the Western Cape Province of South Africa and chromatographically profiled by ultra-performance liquid chromatography coupled to mass spectrometry (UPLC-MS). The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cytotoxicity assay was performed to determine the non-toxic concentrations of the extract for subsequent use in the in vitro scratch assay. Both the human keratinocyte (HaCaT) and fibroblast (BJ-5ta) cell lines were employed in the in vitro scratch assay. The in vivo caudal fin amputation assay was used to assess the wound healing potential of L. fruticosus, by monitoring fin regeneration in zebrafish larvae treated with the plant extract at various concentrations. RESULTS: Six major compounds were tentatively identified in the L. fruticosus extract namely; globoidnan A, globoidnan B, rutin, rabdosiin, sagerinic acid and rosmarinic acid. The potentially toxic pyrrolizidine alkaloids were also identified and quantitatively confirmed to be present at a low concentration of 119.58 ppm (m/m). Treatment of HaCaT and BJ-5ta cells with the plant extract in the scratch assay resulted in an increase in cell migration, which translates to accelerated wound closure. After 24 hr treatment with 100 µg/mL of extract, wound closure was recorded to be 91.1 ± 5.7% and 94.1 ± 1.3% for the HaCaT and BJ-5ta cells, respectively, while the untreated (medium) controls showed 72.3 ± 3.3% and 73.0 ± 4.3% for the two cell lines, respectively. Complete wound closure was observed between 24 and 36 hr, while the untreated control group did not achieve 100% wound closure by the end of the observation period (48 hr). In vivo, the crude extract at 100 µg/mL accelerated zebrafish caudal fin regeneration achieving 100.5 ± 3.8% regeneration compared to 68.3 ± 6.6% in the untreated control at two days post amputation. CONCLUSIONS: The study affirms the wound healing properties, as well as low toxicity of L. fruticosus using both in vitro and in vivo assays, which supports the traditional medicinal use. Other in vitro assays that target different mechanisms involved in wound healing should be investigated to support the current findings.

Asunto(s)

Boraginaceae , Extractos Vegetales , Cicatrización de Heridas , Pez Cebra , Cicatrización de Heridas/efectos de los fármacos , Animales , Extractos Vegetales/farmacología , Humanos , Boraginaceae/química , Bioensayo , Línea Celular , Queratinocitos/efectos de los fármacos , Sudáfrica , Células HaCaT , Movimiento Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos

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Cat-scratch disease (CSD), caused by Bartonella henselae (B. henselae), typically presents with regional lymphadenopathy following a cat scratch or bite. We report a case of a 50-year-old man with a complex medical history including HIV, Crohn's disease, coronary artery disease, and bipolar disorder, who presented with progressively enlarging cervical lymphadenopathy associated with fever, night sweats, and myalgias. Initial evaluation suggested a neoplastic etiology, prompting extensive laboratory investigations and imaging. However, subsequent history prompted serological testing and markedly elevated Bartonella antibody titers, leading to a clinical diagnosis of CSD. Empirical doxycycline therapy was initiated, resulting in the complete resolution of symptoms. This case underscores the importance of considering CSD in the differential diagnosis of lymphadenopathy, particularly in people living with HIV regardless of immunocompetency, and highlights the challenges of diagnosis and management in complex patients.

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Cat scratch disease (CSD) typically presents as a self-limiting lymphadenopathy associated with a cat bite or scratch and commonly affects children and young adults. Atypical manifestations, involving the eyes, nervous system, heart, liver, spleen, skin, and musculoskeletal system, could be severe and difficult to diagnose, and they could occur in 5%-20% of the cases. Herein, we report an unusual case of CSD with multifocal osteomyelitis. A 15-year-old girl presented with right axillary lymphadenopathy. Since she had a history of cat scratch, azithromycin was started for CSD. Two days later, she was readmitted to our hospital with severe back pain which required differential diagnosis. Lumbar spinal magnetic resonance imaging (MRI) revealed multifocal vertebral osteomyelitis. The patient was hospitalized, and then teicoplanin and cefotaxime were added to the azithromycin therapy. After excluding the possible other causes, the definitive diagnosis of osteomyelitis secondary to CSD was made upon the combination of the MRI scan findings of the vertebrae, histopathological investigation of excisional right axillary biopsy, positron-emission tomography/computed tomography (PET/CT), and Bartonella henselae serologies. Atypical manifestations of CSD are widely variable; therefore, it should be kept in mind in the differential diagnosis of severe musculoskeletal pain and osteomyelitis.

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Parinaud oculoglandular syndrome (POGS), is typically rare and often presented as a unilateral ocular inflammation accompanied by ipsilateral lymphadenopathy. POGS is an atypical manifestation of cat scratch disease (CSD) caused by Bartonella henselae (BH). Diagnosis of POGS poses a challenge due to its rarity and the array of potential etiologies including infections from fleas, ticks, and various microorganisms. This case series details three cases of CSD attributed to POGS, highlighting the diagnostic challenges faced in the absence of the gold standard diagnostic method, which is the polymerase chain reaction (PCR) DNA test for BH. The cases encompass a set of presentations including granulomatous inflammation and lymphadenopathy, managed effectively with antibiotics and non-pharmacological interventions such as flea control in domestic felines and hygiene measures post-feline inflicted injury. These cases highlight the necessity for heightened clinical suspicion, especially in patients with a history of feline contact, and appeal for further research to refine diagnostic criteria for more accurate and practical detection of CSD particularly for the atypical manifestations. This will be especially beneficial in areas where the more invasive lesion biopsy or gold standard PCR DNA test for BH are not available so accurate management can be instituted immediately in cases where there is multisystemic involvement.

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OBJECTIVES: Several prospective blinded studies have found poorer sensitivity for the sensory collapse test than reported by Susan E Mackinnon's team. However, the blinded examiner had no knowledge of the patient's clinical presentation, or even of the purpose of the test. In these conditions, it seems difficult to perform the sensory collapse test correctly. The aim of the present study was to evaluate the efficacy of the sensory collapse test in the diagnosis of nerve compression in the upper extremity, using a trained, "partially" blinded examiner, with a minimum of clinical information in order to avoid bias due to poor execution of the test, while still unable to influence the test result. METHODS: Seventy-two patients with diagnosis of nerve entrapment in the upper extremity were included prospectively. The sensory collapse test was performed by two examiners, one of whom was blinded to laterality and to the site of nerve compression, aware only of the affected nerve. Using electrodiagnosis study as reference, the sensitivity and specificity of the sensory collapse test were calculated for each examiner. RESULTS: The unblinded examiner showed 72% sensitivity and 57% specificity, and the blinded 68% sensitivity and 57% specificity. CONCLUSIONS: The sensory collapse test is a useful for diagnosis of nerve entrapment in the upper limb, even with a blinded examiner.

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During the development of the mouse dentate gyrus (DG), granule neuronal progenitors (GNPs) arise from glial fibrillary acidic protein (GFAP)-expressing neural stem cells in the dentate notch. However, the transcriptional regulators that control their stepwise differentiation remain poorly defined. Since neurogenesis involves epithelial-to-mesenchymal transition (EMT)-like processes, we investigated the spatio-temporal expression profiles of the EMT transcription factors Zeb1, Scratch2 (Scrt2) and Nkx6-2 in relation to known GNP markers. Our results show that Zeb1 and Scrt2 exhibit sequential, but partially overlapping expression across embryonic and postnatal stages of GNP differentiation. Zeb1 is highly enriched in gfap-GFP+/Sox2+ neural stem/progenitor pools and subsets of Tbr2+/Prox1+/NeuroD+ intermediate GNPs, whereas Scrt2 predominates in Tbr2+/Prox1+/NeuroD+ GNPs. Strikingly, the neuronal EMT regulator Nkx6-2 shows selective expression in postnatal Tbr2+/Prox1+ GNPs, but it is excluded from embryonic counterparts. This temporally coordinated yet distinct expression of Zeb1, Scrt2 and Nkx6-2 reveals discrete transcriptional programs orchestrating GNP differentiation and neurogenic progression at embryonic versus postnatal stages of DG neurogenesis.

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INTRODUCTION: Honey possesses several positive properties, making it effective in wound healing mechanisms. However, very little information is available on the different honey types for wound healing activity. METHOD: In the first "Academy of Sciences", a public engagement project with high school students, we assessed the properties of thirteen kinds of honey from the Piedmont area (Nord West Italy). In particular, we characterized the color intensity (by Pfund scale), total phenolic content (TPC), total flavonoid content (TFC), H2O2 production, and wound closure rate. RESULTS: Then, we tried to verify the presence of a correlation between these parameters, finding a positive correlation between H2O2 and wound closure rate. CONCLUSION: These data pave the way to characterize different types of Italian honey to completely understand its potential.

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We reported the case of a 13-year-old immunocompetent boy presenting with a right cervical neck mass. He complained of fatigue, back pain, coughing, and a right neck mass persisting for three months. He did not have a fever, but his parents reported he had lost 20 lbs. in the past six months without any change in diet or appetite. They are also very concerned about the risk of malignancy. During the initial work-up, there was no abnormality in the complete blood count. During the follow-up visit 10 days later, he complained of new-onset dysphagia and throat pain. The mass was about 5 cm on the right neck, poorly mobile, and mildly tender to palpation. It looks significantly different compared to the first visit. Blood serology tests were indicated, and titers of cytomegalovirus (CMV), Epstein-Barr virus (EBV), and toxoplasma were not reactive. However, serology detected that IgM and IgG titers to Bartonella henselae were ≥1:20 and ≥1:1024, respectively. A fine needle aspiration (FNA) of the mass on the same day revealed lymphoid proliferation. Afterward, the patient was treated with amoxicillin-clavulanic acid for two weeks. After three weeks, the mass almost disappeared, and the patient reported a remarkable improvement in symptoms. This case report is a helpful reminder that B. henselae should be suspected on the differential diagnoses in a case of lymphadenopathy associated with non-specific symptoms such as fatigue, back pain, and weight loss.

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Purpose: The paper shows a preliminary study of the basic strength parameters of printed parts made of biocompatible polymers with ceramic layers applied to increase the strength of the tool cutting surface. Methods: The specimens were made from different materials and using different 3D printing technologies and the working surfaces that will eventually form the cutting element of the tool were coated with Al2O3. Gloss tests were conducted, properties of the coating, a scratch test of the coated surface, also evaluated surface to-pography. Results: Based on the conducted research, it was found that polymeric materials are characterized by sufficient strength and can be used for disposable tools, however, the use of thin layers of Al2O3 significantly increases the surface strength parameters, which may have a significant impact on the reliability and durability of the tools. The polymer surface covered with an Al2O3 layer is characterised by increased scratch resistance ranging from 24% to 75% depending on the core material and printing technology. The gloss of the surfaces is disproportionately low compared to currently used metal tools, which indicates that they can be used in endoscopic procedures. Conclusions: Based on the conducted research, it was found that the use of thin layers of Al2O3 covering polymer 3D prints is an excellent way to increase strength parameters such as scratch resistance, tribological parameters and light reflections arising on the surface as a result of endoscopic lighting are disproportionately small compared to metallic biomaterials. This gives great hope for using polymer 3D prints for personalised neurosurgical tools.

Asunto(s)

Cerámica , Ensayo de Materiales , Impresión Tridimensional , Cerámica/química , Materiales Biocompatibles Revestidos/química , Materiales Biocompatibles Revestidos/farmacología , Propiedades de Superficie , Óxido de Aluminio/química

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Cat-scratch disease (CSD) is a self-limited disease caused by Bartonella henselae, a fastidious gram-negative intracellular bacillus bacterium. Neuroretinitis, a form of optic neuropathy characterised clinically by optic disc swelling and a macular star, is an uncommon manifestation of CSD occurring in approximately 1-2% of cases. We report a case of a 14-year-old female who presented to the emergency department with a chief complaint of acute painless vision loss described as a large black spot in the centre of her right eye vision 2 weeks after being scratched by cats. Fundus examination revealed Frisen grade 5 disc oedema with an atypically diffuse disc and peripapillary haemorrhages with associated subretinal fluid and a macular star in the right eye. Optical coherence tomography (OCT) of the macula and retinal nerve fibre layer showed subretinal fluid involving the fovea, a serous retinal detachment of the nasal macula, and significant optic disc oedema in the right eye. The patient was admitted and treated with doxycycline, rifampin, and prednisone taper. After completing the treatment course, the patient's vision improved, fundus examination showed significantly improved disc oedema and haemorrhages, and OCT demonstrated resolution of the subretinal fluid in the right eye.

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Chronic wounds can develop as a result of prolonged inflammation during the healing process, which can happen due to bacterial infection. Therefore, preventing infection and controlling inflammation can accelerate wound healing. Antimicrobial peptides have different protective properties in addition to antimicrobial activity. Some of these activities include the stimulation of cytokine or chemokine synthesis, the facilitation of chemotaxis and cell proliferation, the acceleration of cell proliferation, the induction of anti-inflammatory responses, and the promotion of wound repair. This study aimed to assess the wound healing potential of a novel in silico-designed antimicrobial peptide. Then, its anti-inflammatory activity was investigated by measuring the level of tumor necrosis factor-α (TNF-α) and transforming growth factor beta (TGF-ß) as indicators of the wound healing process. In addition, the influence of the peptide on cell migration was evaluated by a scratch test on human dermal fibroblasts (HDF) and HaCaT cells as a human epidermal keratinocyte cell line. The results showed that our new peptide could act well in inhibiting TNF-α over-secretion while increasing the expression of TGF-ß as an anti-inflammatory factor. This peptide showed a significant potential to stimulate HDF and HaCaT cell migration and proliferation. Therefore, using this peptide as an anti-inflammatory component of wound dressings may be promising.

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The aqueous formulation of antismudge coatings is a crucial step for environmental protection and pollution reduction. However, the inferior mechanical durability of waterborne antismudge coatings poses challenges for their practical application. Herein, we developed a fully waterborne antismudge coating with excellent scratch resistance by preparing hyperbranched amine-rich polysiloxane (HySPx) for antismudge ability and epoxy-rich zirconium-based aqueous solution (ZAS) for mechanical performance. The former is obtained by combining SPx, polydimethylsiloxane modified by 3-isocyanatopropyltriethoxysilane (IPTS), with 3-aminopropyltriethoxysilane (KH550), and the latter is synthesized using zirconium propoxide solution (TPOZ) with 3-glycidyloxypropyltrimethoxysilane (KH560). This report investigates the effects of the chain length and content of SPx on the performance of the coating. The results indicate that the coating exhibits optimal comprehensive performance when the molecular weight of polydimethylsiloxane is 4.5 kDa, and the mass fraction of SPx in HySPx is 1.5%. The coating possesses high transparency similar to glass, good adhesion (≈3 MPa) to various substrates, high hardness (8H), flexibility (2.5 mm bending radius), and exceptional antismudge property. More importantly, the coating can still maintain excellent antismudge property even after enduring 400 cycles of abrasion with steel wool. Furthermore, the rapid enrichment of polydimethylsiloxane on the coating surface endows the coating with excellent lubrication ability, allowing most common liquid stains to slide off the coating surface. Moreover, the rewritability of the coating remains stable even after writing traces that have persisted on its surface for several weeks. This coating is anticipated to be utilized for protecting foldable electronic screens, vehicles, and other fields.

RESUMEN

BACKGROUND: The scratch assay is commonly used in cell biology to evaluate cell migration; however, it is not a standardized method; it produces highly variable gap dimensions. We design a printable device, comprising a single wounding tool and a guide, and compared the gap produced by our device and the traditional method. The deviceis printable in a standard 3D printer. Cells were seeded on a 24-well plate. After reaching full confluency, a gap was created using the traditional method (scratch assay with a pipette tip), a pipette tip and the guide of the device, or the single wounding tool and the guide. The gaps were observed for up to 48 h under a light microscope and analyzed. RESULTS: The results show that the traditional method produces irregular and not straight gaps, and had the worst cell migration rates compared to the other groups. The wounding tool produced scrape signs at the well surface. CONCLUSION: The guide and pipette tip delivered the best results for the scratch assay. SIGNIFICANCE: The use of the guide and the pipette tip for the scratch assay allows allows to perform reproducible cell migration experiments.

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Atypical femur fractures (AFFs) are a well-established complication of long-term bisphosphonate (BP) therapy, but their pathogenesis is not fully understood. Although many patients on long-term BP therapy have severe suppression of bone turnover (SSBT), not all such patients experience AFF, even though SSBT is a major contributor to AFF. Accordingly, we evaluated tissue level properties using nano-scratch testing of trans-iliac bone biopsy specimens in 12 women (6 with and 6 without AFF matched for age and race). Nano-scratch data were analyzed using a mixed-model ANOVA with volume-normalized scratch energy as a function of AFF (Yes or No), region (periosteal or endosteal), and a first-order interaction between region and AFF. Tukey post hoc analyses of the differences of least squared means of scratch energy were performed and reported as significant if p<.05. The volume-normalized scratch energy was 10.6% higher in AFF than in non-AFF patients (p=.003) and 17.9 % higher in the periosteal than in the endosteal region (p=.004). The differences in normalized scratch energy are suggestive of a higher hardness of the bone tissue after long-term BP therapy. The results of this study are consistent with other studies in the literature and demonstrate the efficacy of using Nano-Scratch technique to evaluate bone tissue that exhibits SSBT and AFF. Further studies using nano-scratch may help quantify and elucidate underlying mechanisms for the pathogenesis of AFF.

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OBJECTIVE: In the current research, 6-gingerol (GA)-loaded nanofiber drug delivery system were developed, and their potential usage in wound healing was evaluated. SIGNIFICANCE: This study investigates the effectiveness of nanofibrous membranes composed of sodium alginate (SA), poly(vinyl alcohol) (PVA), and 6-gingerol (GA) as delivery systems for anti-inflammatory agents in the context of wound dressings. METHODS: GA-loaded SA/PVA nanofiber was prepared using electrospinning. In vitro characterization of this nanofiber included the examination of comprehensive in vitro characterization, anti-inflammatory and antioxidant activities, cytotoxicity, a scratch tes and in vivo skin test. RESULTS: GA was extracted from Zingiber officinale, and its successful isolation was confirmed through analyses such as H-NMR, C-NMR. Then GA was electrospuned into the SA/PVA nanofibers, and scanning electron microscopy (SEM) imaging revealed that the fiber diameters of the formulations ranged between 148 nm and 176 nm. Anti-inflammatory and antioxidant studies demonstrated that the effectiveness of GA increased with higher doses; however, this increase was accompanied by decreased cell viability. In vitro release studies revealed that GA exhibited a burst release within the first 8 h, followed by a controlled release, reaching completion within 24 h. Within the scope of in vitro release kinetics, release data are mathematically compatible with the Weibull model with high correlation. The scratch test results indicated that TB2 (%1 GA) promoted epithelialization. Furthermore, it was determined that TB2 (%1 GA) did not cause any irritation. CONCLUSIONS: As a result, TB2 shows promise as a formulation for wound dressings, offering potential benefits in the field of wound care.

Asunto(s)

Alginatos , Antioxidantes , Catecoles , Alcoholes Grasos , Nanofibras , Alcohol Polivinílico , Cicatrización de Heridas , Alcoholes Grasos/química , Nanofibras/química , Cicatrización de Heridas/efectos de los fármacos , Catecoles/química , Catecoles/farmacología , Catecoles/administración & dosificación , Alginatos/química , Animales , Alcohol Polivinílico/química , Antioxidantes/administración & dosificación , Antioxidantes/farmacología , Antioxidantes/química , Antiinflamatorios/administración & dosificación , Antiinflamatorios/farmacología , Antiinflamatorios/química , Humanos , Zingiber officinale/química , Sistemas de Liberación de Medicamentos/métodos , Supervivencia Celular/efectos de los fármacos , Liberación de Fármacos , Vendajes , Ratas , Polímeros/química , Masculino , Ratones

RESUMEN

Introduction: Bartonella henselae, the causative agent of cat scratch disease (CSD), presents with diverse ocular manifestations, posing diagnostic challenges. This study aimed to elucidate the diagnostic complexities through a unique case. Case Presentation: A 42-year-old male presented with vision loss in the right eye, subsequent to flu-like symptoms following exposure to a stray kitten. Clinical examination revealed branch retinal artery occlusion (BRAO) in the right eye and neuroretinitis in the left, indicating concurrent ocular manifestations of CSD. Thorough investigations, including serological testing, ruled out alternative causes, highlighting the rarity of such coexisting ocular complications. Conclusions: The coexistence of BRAO and neuroretinitis in different eyes underscores the variable presentation of CSD. Recognition of infectious etiologies, particularly Bartonella, is paramount in diagnosing ocular vasculopathies. This case emphasizes the importance of considering Bartonella infection in patients with ocular vascular occlusions, especially in the context of recent cat exposure and systemic symptoms suggestive of CSD.

RESUMEN

OBJECTIVES: Chronic abdominal pain is occasionally caused by an abdominal wall entity such as anterior cutaneous nerve entrapment syndrome (ACNES). This syndrome is thought to occur due to intercostal nerve branches (T7-12) that are entrapped in the rectus abdominis muscles. The diagnosis is largely based on subjective clues in patient history and physical examination. A test referred to as the scratch collapse test (SCT) is used as an additional diagnostic tool in peripheral nerve entrapment syndromes such as the carpal tunnel syndrome. The aim of the present study is to investigate whether an SCT was positive in patients with suspected ACNES. If so, this finding may support its hypothesized neuropathic character. METHODS: A prospective, case-control study was performed among patients with ACNES (n = 20) and two control groups without ACNES (acute intra-abdominal pathology n = 20; healthy n = 20), all were consecutively included. ACNES was diagnosed based on previously published criteria. The SCT test was executed at the painful abdominal area in both patient groups and at a corresponding area in healthy controls. Predictive values, sensitivity, and specificity were calculated. Videos of tests were evaluated by blinded observers. RESULTS: SCT was judged positive in 19 of 20 ACNES patients but not in any of the 40 controls. A 95% sensitivity (confidence interval [CI]: 75-99) and optimal specificity (100%; CI: 83-100) were calculated. CONCLUSIONS: The positive SCT supports the hypothesis that ACNES is an entrapment neuropathy. A positive SCT should be considered a major diagnostic criterion for ACNES.

Asunto(s)

Síndromes de Compresión Nerviosa , Humanos , Síndromes de Compresión Nerviosa/diagnóstico , Estudios de Casos y Controles , Masculino , Femenino , Estudios Prospectivos , Persona de Mediana Edad , Adulto , Dolor Abdominal , Sensibilidad y Especificidad , Nervios Intercostales , Anciano

RESUMEN

Xylometazoline is a well-established nasal decongestant that has been used alone and in combination with dexpanthenol as an over the counter (OTC) medicine. Considering the possibility of further improvement of xylometazoline nasal formulations, hyaluronic acid (HA) was evaluated as an additional ingredient. The aim of this study was to investigate the permeation, mucosal retention, and mucoadhesion properties of a new xylometazoline-HA [Xylo-HA] formulation ex vivo and to explore the potential benefits of incorporating HA in the formulation in vitro. Sheep nasal mucosa was used in the ex vivo study, where Xylo-HA was compared with xylometazoline alone [Xylo-Mono], and in combination with dexpanthenol [Xylo-Dex] to understand the impact of formulation changes. The permeation of xylometazoline was generally low (Xylo-Mono 11.14 ± 4.75 %, Xylo-HA 14.57 ± 5.72 % and Xylo-Dex 11.00 ± 3.05 % of the applied dose). The steady state fluxes of xylometazoline were determined as 12.64 ± 3.52 µg/cm2h, 14.94 ± 3.38 µg/cm2h and 12.19 ± 2.05 µg/cm2h for Xylo-Mono, Xylo-HA and Xylo-Dex, respectively. No significant differences were observed between the formulations in the permeation nor mucosal retention studies (p > 0.05 for all), while Xylo-HA exhibited superior mucoadhesive proprieties (p < 0.05 for all). The effects on wound healing and barrier integrity of the three xylometazoline formulations were tested in vitro on HaCaT cells. To better elucidate the role of HA, an additional HA formulation without xylometazoline was prepared (HA-Mono). A scratch test was performed to evaluate wound healing, revealing that the test formulations did not achieve complete wound closure within 72 h and demonstrated a similar effect at the end of the testing period. To assess the effect on barrier integrity, cells were treated for 5 days with daily measurements of transepithelial electrical resistance (TEER). At the end of the experiment, Xylo-Dex showed a moderate 14 % increase in TEER, while Xylo-Mono did not significantly affect this parameter. TEER rose by 951 % in the Xylo-HA, and by 10497 % in the HA group, suggesting that incorporating HA led to enhanced barrier function. Further clinical studies are recommended to better understand the clinical implications and efficacy of the Xylo-HA formulation, with particular focus on the role of HA.

Asunto(s)

Ácido Hialurónico , Imidazoles , Mucosa Nasal , Animales , Ovinos , Imidazoles/administración & dosificación , Imidazoles/química , Imidazoles/farmacocinética , Imidazoles/farmacología , Ácido Hialurónico/química , Mucosa Nasal/metabolismo , Mucosa Nasal/efectos de los fármacos , Descongestionantes Nasales/administración & dosificación , Administración Intranasal , Humanos , Química Farmacéutica/métodos , Permeabilidad , Composición de Medicamentos/métodos

RESUMEN

BACKGROUND/AIM: Because the skin is exposed to the external environment, it is important that wound healing processes proceed and terminate rapidly to minimize the risk of infection. A previous case report described the promotion of wound healing by transdermal administration of lipopolysaccharide derived from Pantoea agglomerans (LPSp). However, whether the wound healing-promoting effect of LPSp was due to direct activity on skin cells or indirect effects involving macrophages remained unclear. Therefore, this study investigated the wound healing-promoting effect of LPSp, particularly the promotion of keratinocyte migration. MATERIALS AND METHODS: The migration of HaCaT human keratinocytes over time with and without LPSp was assayed using a cell migration assay kit. Migration was also analyzed using HaCaT cells treated with LPSp and an antibody against Toll-like receptor (TLR) 4, a receptor for LPS. RESULTS: Addition of LPSp significantly enhanced cell migration compared to no LPSp addition. Migration was inhibited by the addition of anti-TLR4 antibody. CONCLUSION: LPSp acts directly on epidermal cells to promote migration and may be one mechanism by which LPSp promotes wound healing.

Asunto(s)

Movimiento Celular , Queratinocitos , Lipopolisacáridos , Pantoea , Cicatrización de Heridas , Humanos , Queratinocitos/efectos de los fármacos , Queratinocitos/metabolismo , Movimiento Celular/efectos de los fármacos , Lipopolisacáridos/farmacología , Cicatrización de Heridas/efectos de los fármacos , Receptor Toll-Like 4/metabolismo , Línea Celular

RESUMEN

Cat-scratch disease (CSD) is an infectious disease caused by Bartonella henselae, presenting with fever and lymphadenopathy following contact with felines. The ocular manifestations include neuroretinitis, characterised by optic nerve swelling and a macular star. Case Presentation: We discuss a case of neuroretinitis that presented atypically, without a macular star. There was an initial suspicion of Bartonella, but the serology was negative. Our patient was eventually empirically treated for infective neuroretinitis based on a positive contact history (recently scratched by one of his three pet cats). There was progression to a macular star upon serial dilated fundus examination, and the repeated serology one week after symptom onset showed rising titres, supporting a diagnosis of CSD. Conclusions: A judicious review of systems, repeat assays, serial dilated fundus examination, and early ophthalmic evaluation are useful in cases of suspected neuroretinitis, remaining an important differential in the evaluation of sudden-onset painless vision loss and unilateral disc swelling.