Long-term impact of dry eye symptoms on vision-related quality of life after phacoemulsification surgery.

PURPOSE: To observe the long-term changes in dry eye symptoms and vision-related quality of life in age-related cataract patients after phacoemulsification. METHODS: A total of 101 cataract patients after phacoemulsification combined with IOL implantation (Ph-IOL) in one eye were enrolled. Visual acuity, tear film breakup time (BUT), and Schirmer test 1 (ST1) were measured before and 1, 3, and 6 months after surgery. Ocular Surface Disease Index (OSDI) scores were used to evaluate the severity of dry eye symptoms. Utility values were assessed by the time trade-off (TTO), standard gamble for death (SGD), standard gamble for blindness (SGB) and rating scale (RS). RESULTS: The average LogMAR visual acuity in the operated eye was 1.35 ± 0.50 and increased rapidly after Ph-IOL, approaching a peak at 3 months (0.26 ± 0.15). The BUT and ST1 results decreased abruptly 1 month after surgery and gradually recovered until 6 months. OSDI scores increased significantly after surgery and gradually decreased until 6 months. Utility values evaluated by TTO, SGD, SGB and RS before surgery were 0.67 ± 0.19, 0.75 ± 0.15, 0.67 ± 0.20 and 0.2 ± 0.18, respectively, and increased to 0.91 ± 0.06, 0.98 ± 0.04, 0.92 ± 0.52 and 0.91 ± 0.06, 6 months after. Utility values measured with TTO, SGB or RS correlated significantly (P < 0.05) with visual acuity and OSDI scores pre- and postoperatively. CONCLUSIONS: Dry eye symptoms persist more than 3 months after Ph-IOL. Utility values were negatively influenced by dry eye symptoms.

Updated severity and prognosis score of pulmonary alveolar proteinosis: A multi-center cohort study in China.

Background: The high-resolution computed tomography (HRCT) score is an important component of the severity and prognosis score of pulmonary alveolar proteinosis (SPSP). However, the HRCT score in SPSP only considers the extent of opacity, which is insufficient. Methods: We retrospectively evaluated HRCT scores for 231 patients with autoimmune pulmonary alveolar proteinosis (APAP) from three centers of the China Alliance for Rare Diseases. The SPSPII was created based on the overall density and extent, incorporating the SPSP. The severity of APAP patients was assessed using disease severity scores (DSS), SPSP, and SPSPII to determine the strengths and weaknesses of the different assessment methods. We then prospectively applied the SPSPII to patients before treatment, and the curative effect was assessed after 3 months. Results: The HRCT overall density and extent scores in our retrospective analysis were higher than the extent scores in all patients and every original extent score severity group, as well as higher related to arterial partial oxygen pressure (PaO2) than extent scores. The mild patients accounted for 61.9% based on DSS 1-2, 20.3% based on SPSP 1-3, and 20.8% based on SPSPII 1-3. Based on SPSP or SPSPII, the number of severe patients deteriorating was higher in the mild and moderate groups. When applied prospectively, arterial PaO2 differed between any two SPSPII severity groups. The alveolar-arterial gradient in PaO2 (P[A-a]O2), % predicted carbon monoxide diffusing capacity of the lung (DLCO), and HRCT score were higher in the severe group than in the mild and moderate groups. After diagnosis, mild patients received symptomatic treatment, moderate patients received pure whole lung lavage (WLL) or granulocyte-macrophage colony-stimulating factor (GM-CSF) therapy, and severe patients received WLL and GM-CSF therapy. Importantly, the SPSPII in mild and severe groups were lower than baseline after 3 months. Conclusion: The HRCT density and extent scores of patients with APAP were better than the extent score. The SPSPII score system based on smoking status, symptoms, PaO2, predicted DLCO, and overall HRCT score was better than DSS and SPSP for assessing the severity and efficacy and predicting the prognosis. Trial registration: ClinicalTrial.gov, identifier: NCT04516577.

2-Methoxyestradiol improves the apoptosis level in keloid fibroblasts through caspase-dependent mechanisms in vitro.

Apoptosis is a form of programmed cell death that occurs in multicellular organisms. Fibroblasts are the main cellular ingredients in keloid tissue, which has a relatively low apoptosis level. A natural metabolite of estradiol, 2-Methoxyestradiol (2ME2) exerts a pro-apoptotic effect on tumor cells. In this study, the expression levels of key factors in the apoptosis pathway and the expression level of the proliferating cell nuclear antigen (PCNA) were measured to assess the levels of apoptosis and proliferation in both normal skin fibroblasts and keloid fibroblasts. Twelve samples were obtained from 12 patients: 6 keloid patients and 6 non-keloid patients. All 12 of the patients were randomly selected from the Department of Plastic Surgery at Peking Union Medical College Hospital from June 2016 to December 2016. After cell culture, fibroblasts were divided into the following 6 groups: normal skin fibroblasts (S); keloid fibroblasts (K); keloid fibroblasts treated with 2ME2 (2ME2); keloid fibroblasts treated with DMSO (DMSO); keloid fibroblasts treated with the caspase inhibitor Ac-DEVD-CHO (IN); and keloid fibroblasts treated with both Ac-DEVD-CHO and 2ME2 (IN+2ME2). Fibroblasts at up to passage 3 were used for analysis. Cell activity was measured by the cell counting kit-8. TUNEL staining was used to observe the cell apoptotic morphology. The key apoptosis factors (caspase-3, caspase-8, caspase-9, Bcl-2, Bax, and cytochrome-c) and PCNA expression levels were detected by immunofluorescence analysis and Western blotting. A certain concentration of 2ME2 was also used in group S to evaluate the toxicity. Compared with that in the other groups, 2ME2 significantly inhibited cell activity and led to apoptotic appearance of fibroblasts. In protein analysis, 2ME2 remarkably increased the expression of apoptosis factors and decreased the PCNA expression. Apoptosis levels were reduced by both the caspase inhibitor and 2ME2; thus indicating that the pro-apoptosis effect of 2ME2 was achieved through a caspase-dependent mechanism in keloid fibroblasts. Toxicity assessment showed that 2ME2 had a very low influence on normal skin fibroblasts. 2ME2, considered to be a new promising type of chemotherapy drug, exerts a pro-apoptosis effect by regulating the caspase family and an anti-proliferation effect towards keloid fibroblasts, and it presents low toxicity towards normal fibroblasts in vitro.

Sensitization of keloid fibroblasts by quercetin through the PI3K/Akt pathway is dependent on regulation of HIF-1α.

Keloids are raised, red, hard and irregular tumors that are prone to extend beyond the wound borders. Surgical excision is not sufficient to eradicate a keloid. Adjuvant therapy with radiation is a recommended treatment that reportedly achieves improved efficacy. However, radiation does not only kill cells in the keloid tissue but also stimulates their resistance, and intractable cases can display continuous recurrence. Quercetin was initially extracted from natural products and is used as a dietary supplement. The role of quercetin as an oxidant scavenger has been highlighted in many studies and has drawn interest to the application of ionizing radiation (IR) sensitization. In this study, we first demonstrate that keloid fibroblasts acquire resistance after IR treatment, and this can be relieved by treatment with quercetin. Further, we showed that hypoxia-inducible factor 1 (HIF-1), a prognostic marker used in clinical practice after radiation therapy, was associated with stronger radioresistance in keloid fibroblasts, which was downregulated after quercetin treatment. The inhibition of HIF-1 expression by quercetin was found to be dependent on the phosphatidylinositol-3-kinase (PI3K)/Akt pathway. Quercetin has been reported to reduce the phosphorylation of Akt. Taken together, we revealed one mechanism underlying the suppression of radioresistance by quercetin, which involved the regulation of HIF-1α by the PI3K/Akt pathway. Our study provides a molecular basis for the application of quercetin in radiation sensitization in the treatment of keloids.

Role of pigment epithelium-derived factor on proliferation and migration of choroidal capillary endothelium induced by vascular endothelial growth factor in vitro.

BACKGROUND: Pigment epithelium-derived factor (PEDF) is expressed in several normal organs and identified as an inhibitor of neovascularization. In the present study, we investigated the effect of PEDF in an in vitro model of ocular choroidal neovascularization. METHODS: Microdissection was used to isolate the human choroidal endothelial cells (CECs), followed by the use of superparamagnetic beads (Dynabeads) coated with the CD31 antibody, which selectively binds to the endothelial cell surface. The mitogenic and motogenic effects of vascular endothelial growth factor (VEGF) on cultured choroidal capillary endothelial cells were examined in the presence or absence of PEDF (1, 10, 100, and 1000 ng/ml) using cell counts and migration assays. RESULTS: Cells bound to the beads were isolated using a magnetic particle concentrator and they were successfully cultured and characterized to be endothelial cells that possessed greater than 95% immunoreactivity to von Willebrand factor. PEDF suppressed the proliferation and migration of VEGF-induced choroidal capillary endothelial cells. However, the concentration of PEDF which we used has little effect on normal CECs. CONCLUSIONS: PEDF played an important role on the growth and migration of VEGF-stimulated choroidal endothelial cell. These findings suggest that PEDF may be an effective approach to the treatment of choroidal neovascular disorders.

[Role of ciliary neurotrophic factor in regeneration of severed facial nerve of cats].

OBJECTIVE: To study the role of extrinsic (CNTF) in the regeneration of severed facial nerve in cats. METHOD: The facial nerve in temporal bone of adult cats were severed and the severed ends were connected with CNTF or saline applied at the connection. Electrophysiological examination and immunocytochemistry were performed with immunoelectron microscope for morphological analysis at 2, 4 and 8 weeks after the operation. RESULTS: Two weeks after operation, both CNTF and saline groups failed to exhibit muscular excitement by facial nerve stimulation, but the amount of myelinated nerve fibers had statistical difference between the two groups (P<0.05). At 4 weeks, the latency of the facial muscle excitement was 7.832+/-2.695 ms in CNTF group and 16.120+/-3.516 ms in saline group, and the average number of myelinated axons was significantly different between the two groups (1,435+/-318 vs 957+/-269, P<0.05). At the 8th weeks, the latency of facial muscle excitement was reduced to 3.125+/-0.165 ms in CNTF group and to a comparable level of 3.095+/-0.178 ms in saline group (P>0.05), and the average number of myelinated axons increased to 1,695+/-283 and 1,543+/-320 respectively in the two groups (P>0.05). Significant increase of Schwann cells was noted in both groups at this stage. CONCLUSION: Local application of CNTF may enhance facial early-stage nerve regeneration in adult cats, but its long-term effects remain unclear.

[Analysis of related factors of nasosinusitis after radiotherapy for nasopharyngeal carcinoma].

OBJECTIVE: To study the incidence, clinical features and related factors of nasosinusitis after radiotherapy for nasopharyngeal carcinoma. METHODS: Five hundred and thirteen patients with nasopharyngeal carcinoma were included in the study, to observe the clinical manifestation and image changes before and after radiotherapy. The incidence and influencing factors of nasosinusitis after radiotherapy were analyzed. RESULTS: Among 513 patients, before radiotherapy, nasosinusitis was found in 51 patients (9.9%). After radiotherapy, another 401 nasosinusitis was found (401/462). The difference of incidence rate of nasosinusitis before and after radiotherapy was obvious (chi2 = 533.21, P < 0.01). The incidence rate of nasosinusitis in the end of radiotherapy, 3 months, 6 months, 12 months and 18 months after radiotherapy was 10.7% (43/401), 13.7% (55/401), 58.1% (233/401), 12.0% (48/401), 5.5% (22/401) respectively. The incidence rate of nasosinusitis after fractional radiotherapy and continuous radiotherapy was 35.7% (143/401), 64.3% (258/401) respectively. CONCLUSION: The incidence rate of nasosinusitis after radiotherapy is very high. It is influenced by the dose of radiotherapy, but it has no relation with the extension of nasopharyngeal carcinoma.