Neutrophil L-plastin controls ocular paucibacteriality and susceptibility to keratitis

Why ocular mucosa is paucibacterial is unknown. Many different mechanisms have been suggested but the comprehensive experimental studies are sparse. We found that a deficiency in L-plastin (LCP1), an actin bundling protein, resulted in an ocular commensal overgrowth, characterized with increased presence of conjunctiva

Restoration of Corneal Transparency by Mesenchymal Stem Cells

Summary Transparency of the cornea is indispensable for optimal vision. Ocular trauma is a leading cause of corneal opacity, leading to 25 million cases of blindness annually. Recently, mesenchymal stem cells (MSCs) have gained prominence due to their inflammation-suppressing and tissue repair functions. Here, we investigate the potential of MSCs to restore corneal transparency following ocular injury. Using an in vivo mouse model of ocular injury, we report that MSCs have the capacity to restore corneal transparency by secreting high levels of hepatocyte growth factor (HGF). Interestingly, our data also show that HGF alone can restore corneal transparency, an observation that has translational implications for the development of HGF-based therapy

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Kaposiform hemangioendothelioma with satellitosis and Kasabach-Merritt phenomenon

Kaposiform hemangioendothelioma is a rare, potentially life-threatening vascular tumor often associated with a coagulopathy known as Kasabach–Merritt phenomenon (KMP). We report the case of an infant with satellite lesions around a large vascular tumor and associated KMP

Diffuse cutaneous leishmaniasis in an immunocompromised patient resembling histoid Hansen's disease

Cutaneous leishmaniasis is caused by protozoan parasites of the genus Leishmania. Atypical presentation and widespread progression of the lesions may be seen in patients with HIV disease and diffuse cutaneous leishmaniasis and HIV co-infection is emerging as a serious new threat. We report a case of diffuse cutaneous leishmaniasis in a HIV- infected patient resembling Histoid Hansen

Pattern of inpatient referrals to dermatology at a tertiary care centre of South Rajasthan

Background: Dermatologists besides providing service to patients in the outdoors, also play a vital role in the care of inpatients admitted to dermatology unit and other departments. Aims: The aim of this study was to evaluate the pattern of referrals sent to the dermatology department by other departments. Materials and Methods: The study included all inpatients referred to dermatology department of a tertiary care centre of South Rajasthan during a 5-year period from October 2008 to September 2013. Results: A total of 1560 consultations with 1603 diagnoses were recorded. Most (770; 49.3%) consultations were received from internal medicine, followed by surgery (177; 11.3%), pediatrics (104; 6.7%), psychiatry (86; 5.5%) and gynecology (69; 4.4%) wards. Infectious skin diseases were most common (29.7%) followed by eczema (12.0%) and drug reactions (9.0%). Conclusion: Dermatology referrals can enhance the dermatological knowledge of non-dermatologists to diagnose and manage common dermatoses thus improving overall patient care

Mesenchymal Stromal Cells Modulate Corneal Alloimmunity via Secretion of Hepatocyte Growth Factor

Abstract Mesenchymal stromal cells (MSCs) are multipotent stem cells that participate in tissue repair and possess considerable immunomodulatory potential. MSCs have been shown to promote allograft survival, yet the mechanisms behind this phenomenon have not been fully defined. Here, we investigate the capacity of MSCs to suppress the allogeneic immune response by secreting the pleiotropic molecule hepatocyte growth factor (HGF). Using an in vivo mouse model of corneal transplantation, we report that MSCs promote graft survival in an HGF‐dependent manner. Moreover, our data indicate that topically administered recombinant HGF (a) suppresses antigen‐presenting cell maturation in draining lymphoid tissue, (b) limits T‐helper type‐1 cell generation, (c) decreases inflammatory cell infiltration into grafted tissue, and (d) is itself sufficient to promote transplant survival. These findings have potential translational implications for the development of HGF‐based therapeutics. Stem Cells Translational Medicine 2019;8:1030–104

Mast Cells Initiate the Recruitment of Neutrophils Following Ocular Surface Injury

Purpose The purpose of this study was to investigate the contribution of mast cells to early neutrophil recruitment during ocular inflammation. Methods: In a murine model of corneal injury, the epithelium and anterior stroma were removed using a handheld motor brush. Cromolyn sodium (2% in PBS) eye drops were administered topically for mast cell inhibition. In vitro, bone marrow–derived mast cells were cultured alone or with corneal tissue. The frequencies of CD45+ inflammatory cells, CD11b+Ly6G+ neutrophils, and ckit+FcεR1+ mast cells in the cornea were assessed by flow cytometry. mRNA expression of CXCL2 was evaluated by real-time PCR and protein expression by ELISA. β-Hexosaminidase assays were performed to gauge mast cell activation. Results: Neutrophil infiltration of the cornea was observed within 1 hour of injury, with neutrophil frequencies increasing over subsequent hours. Concurrent expansion of mast cell frequencies at the cornea were observed, with mast cell activation (assessed by β-hexosaminidase levels) peaking at 6 hours after injury. Evaluation of CXCL2 mRNA and protein expression levels demonstrated augmented expression by injured corneal tissue relative to naïve corneal tissue. Mast cells were observed to constitutively express CXCL2, with significantly higher expression of CXCL2 protein compared with naïve corneal tissue. Culture with harvested injured corneas further amplified CXCL2 expression by mast cells. In vivo, mast cell inhibition was observed to decrease CXCL2 expression, limit early neutrophil infiltration, and reduce inflammatory cytokine expression by the cornea. Conclusions: Our data suggest that mast cell activation after corneal injury amplifies their secretion of CXCL2 and promotes the initiation of early neutrophil recruitment

Phacomatosis cesioflammea with Klippel Trenaunay syndrome: A rare association

A 30-year-old Indian male presented with bilateral Nevus of Ota, extensive nevus flammeus over the trunk and left lower limb with soft tissue hypertrophy and varicosities affecting the left lower limb. He was otherwise in good general health. A diagnosis of Phacomatosis cesioflammea or Phacomatosis pigmentovasularis Type II with Klippel Trenaunay syndrome was made. The case is being reported on account of its rarity