Objective To observe the adhesion and growth of LLC-PK1 cells and ECV304 cells on titania nanotube arrays, and provide evidence for construction of miniaturation bioartificial kidney. Methods Four different diameters nanotube materials were prepared by anodic oxidation, each material was processed by unannealed and with UV irradiation, annealed and without UV irradiation, annealed and with UV irradiation, respectively, which had 12 groups totally,then two kinds of cells were separately grown on the 12 materials. The adhesion and growth of the two kinds of cells were studied under a fluorescence microscope. MTT assay was used to test the activity of two kinds of cells on different diameters and the proliferation of two kinds of cells on 70 nm diameters. Results The adhesion and proliferation of two kinds of cells on TiO2 nanotube arrays were basically consistent, both on anatase TiO2 nanotubes with 70 nm diameter but without UV irradiation showed the optimal adhesion and activity. The activities of LLC-PK1 cells and ECV304 cells were both increased with time extended, while the absorbance of ECV304 cells was higher on pure Ti film than on titania nanotube. Conclusion TiO2 nanotube is beneficial to LLC-PK1 cells, but is unfavorable for ECV304 cells when they grow alone.

Objective To evaluate the implication and necessity of deepithelialization in mastopexy.Methods A total of 124 patients with mastoptosis were randomly divided into 2 groups:group Ⅰ and group Ⅱ,62 cases each.A double-circle incision technique was used for all the patients.In group Ⅰ,full thickness skin around nipple-areola was resected.While in group Ⅱ,deepithelialization was performed and the peri nipple-areola dermis was preserved.Results The average full skin resection time was 4.5 minute per side in group Ⅰ and the skin deepithelialization time was 15.8 minute per side in group Ⅱ.Postoperative follow-up was carried out for all the 124 patients with duration of 2 weeks to 4 years.In group Ⅱ,sebaceous cysts,epidermal inclusion cyst and suture knot exclusion were found at the incision site in 8 patients (12.9 ％) at 3 weeks to 1.5 years after operation.Conclusions The blood supply to the nipple-areola complex is not affected by full-thickness skin removal during mastopexy,while the incidence of complication at the incision site decreases significantly.We conclude that deepithelialization has not much clinical significance in mastopexy.

Bone Wires ; Child ; Child, Preschool ; Female ; Fracture Fixation, Internal ; instrumentation ; methods ; Humans ; Humeral Fractures ; diagnostic imaging ; pathology ; physiopathology ; surgery ; Male ; Tomography, X-Ray Computed

The neonatal Fc receptor (FcRn) was first found to be a membrane protein that maternal antibodies transmitted to fetuses and newborns, and also expressed in multiple organs and tissues for whole life in adults. It plays a significant role to central regulate the lifespan of immunoglobulin G and serum albumin, as well as its involvement in innate and adaptive immune responses. In modern biopharmaceuticals, FcRn is a great potential drug delivery target and a highlighted subject for current research. This paper briefly describes the basic biological properties and action mechanism of FcRn, as well as the commonly used drug carrier design strategies of FcRn, especially the functional applications of prolonging half-life, targeted drug delivery, transmembrane and antigen presentation and so on. We propose that these distribution in different tissues and the diverse biological activities may have significant implications of targeting FcRn for novel drug delivery systems and immunotherapy.

OBJECTIVEPrevention of the misdiagnosis of acute appendicitis when it first manifested as acute intestinal obstruction, and to search proper way of diagnosis and treatment for such event to provide the reference.

METHODSClinical data of 33 acute appendicitis cases presented with acute intestinal obstruction in Beijing Tong Ren Hospital during January 2000 and December 2015 were analyzed retrospectively.

RESULTSAll 33 patients were admitted to the Emergency Department with symptoms of various degrees abdominal pain and abdominal distension. There was no passage of gas and feces. The mean time of onset was (62.2±25.0) hours. The imaging examination showedthat all patients had complete bowel obstruction. Twenty one patients(63.6%) had peritonitis, three of whom developed with septic shock. Abdominal CT was performed in 17 patients preoperatively, which showed retention of gas and fluid in the small intestine in all the patients and 13 were suggestive of acute appendicitis. All of these patients received surgical treatment, 12 patients underwent laparoscopic exploration, and the remaining 21 patients received exploratory laparotomy during which acute appendicitis was confirmed to be the cause of intestinal obstruction, of whom 14(42.4%) was identified as mechanical intestinal obstruction. Nine patients underwent appendectomy and lysis of adhesion, five appendectomy and partial excision of the greateromentum. Nineteenpatients(57.6%) were identified as paralytic ileus and underwent appendectomy only. Twelve patients required respiratory and circulatory support and were admitted to ICU postoperatively. The mean duration time in ICU was(8.8±5.2) days. Postoperative pathology showedgangrene accompanied with perforation in the appendix. All patients were discharged without any complication. The length of hospital stay was (15.4±4.6) days. All patients were followed up for 3 ~ 12 months. One patient with chronic obstructive pulmonary disease developed repeated pulmonary infection and died of respiratory failure at 185 days postoperatively. The remaining patients were followed up and there were no patients developed intra-abdominalsepsis, intestinal obstruction, surgery-related complications, or death.

CONCLUSIONPatients with acute appendicitis presenting with acute intestinal obstruction are mostly in severe condition. Clinical diagnosis for this patients is difficult and surgery should be performed as soon as possible.

Abdominal Pain ; Acute Disease ; Appendectomy ; Appendicitis ; diagnosis ; pathology ; surgery ; Diagnostic Errors ; Humans ; Intestinal Obstruction ; diagnosis ; Intestine, Small ; Laparoscopy ; Laparotomy ; Length of Stay ; Physical Examination ; Postoperative Period ; Retrospective Studies

OBJECTIVETo compare the ability of the polysaccharide from various Porphyromonas gingivalis (Pg) type and clinical strains in inducing THP-1 cells to produce cytokines interleukin(IL)-1β, IL-8, and tumor necrosis factor(TNF)-α, in order to analyze the immunogenicity of Pg polysaccharide components and the virulence-associated factors of this periodontal pathogen.

METHODSThe bacterial polysaccharide was extracted from high virulent Pg strains, W83, SJD2, SJD12 and low virulent Pg, ATCC33277, SJD4, SJD5, and SJD11 by phenol-water extraction. The extracted polysaccharide was used to stimulate the THP-1 cells with different simulation periods and doses. The level of the cytokines, including IL-1β,IL-8 and TNF-α in the cell culture suspension was measured by enzyme-linked immunosorbent assay(ELISA).

RESULTSThe polysaccharide extraction of Pg strains was composed of lipopolysaccharide(LPS) and capsular polysaccharide. The secretion of IL-1β, IL-8 and TNF-α, produced by the THP-1 cells showed in a time- and dose-dependent manner in the medium containing 10% fetal bovine serum. The level of these cytokines of the high virulent strains was higher than that of the low virulent strains in medium containing 1% fetal bovine serum.Four hours after stimulation with polysaccharide extracted from high virulent strains, the levels of IL-1β,IL-8, and TNF-α in the cell suspension were (1 639 ± 497), (1 648 ± 513) and (140 ± 48) µg/L, respectively, whereas for low virulent strains, the levels of IL-1β, IL-8, and TNF-α were (773 ± 382), (892 ± 400) and (67 ± 33) µg/L, respectively.

CONCLUSIONSPolysaccharide extracted from Pg could induced the THP-1 cells to secrete the cytokines of IL-1β, IL-8 and TNF-α. The level of the cytokines produced by the THP-1 cells associates with the bacterial virulent properties.

Cytokines ; metabolism ; Interleukin-1beta ; Interleukin-8 ; Lipopolysaccharides ; physiology ; Porphyromonas gingivalis ; metabolism ; Tumor Necrosis Factor-alpha

OBJECTIVETo analyze the capsule related surface properties of Porphyromonas gingivalis (Pg) isolates.

METHODSThe transmission electron microscopy (TEM) was used to observe the capsule structure and the capsule thickness of 2 type of strains and 5 clinical isolates. Microbial adhesion to hydrocarbons (MATH) assay was used to qualitatively assess the hydrophobicity of each strain, and the capacities of these strains were investigated by autoaggregation assay.Ninety-six well biofilm assay and confocal laser scanning microscopy (CLSM) were applied to quantify and observe the biofilm produced by each strain.

RESULTSTEM showed the variety of capsule thickness of these strains.Virulent type strain W83 possessed thicker capsular structure than less-virulent type strain ATCC33277. The SJD4 possessed thicker capsule than other clinical isolates, followed by SJD11, SJD5, SJD2, and SJD12.Strains W83, SJD4, SJD11, with thicker capsule, were much more hydrophilic with lower MATH percentage, in accordance with a slow autoaggregation in incubation during a period of 240 min. Compared with W83, the hydrophobicity of strains ATCC33277, SJD5, SJD2, and SJD12, with thinner capsule, showed increased MATH percentage and autoaggregations. All clinical strains developed biofilm with different absorbance compared with type strains. The CLSM observation showed biofilm thickness of each strain, ranged from (14.74 ± 4.99) to (24.13 ± 5.45) µm. Strain W83 and SJD11 showed notable poor biofilm formation, while others developed dense and mature biofilm.

CONCLUSIONSThere was a certain degree of linkage between the Pg capsule thickness and surface properties diversity.

Bacterial Capsules ; Biofilms ; Hydrophobic and Hydrophilic Interactions ; Porphyromonas gingivalis ; isolation & purification ; Surface Properties

BACKGROUND: Microsatellite instability (MSI) is a key biomarker for cancer immunotherapy and prognosis. Integration of MSI testing into a next-generation-sequencing (NGS) panel could save tissue sample, reduce turn-around time and cost, and provide MSI status and comprehensive genomic profiling in single test. We aimed to develop an MSI calling model to detect MSI status along with the NGS panel-based profiling test using tumor-only samples. METHODS: From January 2019 to December 2020, a total of 174 colorectal cancer (CRC) patients were enrolled, including 31 MSI-high (MSI-H) and 143 microsatellite stability (MSS) cases. Among them, 56 paired tumor and normal samples (10 MSI-H and 46 MSS) were used for modeling, and another 118 tumor-only samples were used for validation. MSI polymerase chain reaction (MSI-PCR) was performed as the gold standard. A baseline was built for the selected microsatellite loci using the NGS data of 56 normal blood samples. An MSI detection model was constructed by analyzing the NGS data of tissue samples. The performance of the model was compared with the results of MSI-PCR. RESULTS: We first intersected the target genomic regions of the NGS panels used in this study to select common microsatellite loci. A total of 42 loci including 23 mononucleotide repeat sites and 19 longer repeat sites were candidates for modeling. As mononucleotide repeat sites are more sensitive and specific for detecting MSI status than sites with longer length motif and the mononucleotide repeat sites performed even better than the total sites, a model containing 23 mononucleotide repeat sites was constructed and named Colorectal Cancer Microsatellite Instability test (CRC-MSI). The model achieved 100% sensitivity and 100% specificity when compared with MSI-PCR in both training and validation sets. Furthermore, the CRC-MSI model was robust with the tumor content as low as 6%. In addition, 8 out of 10 MSI-H samples showed alternations in the four mismatch repair genes ( MLH1 , MSH2 , MSH6 , and PMS2 ). CONCLUSION MSI status can be accurately determined along the targeted NGS panels using only tumor samples. The performance of mononucleotide repeat sites surpasses loci with longer repeat motif in MSI calling.
Humans ; Microsatellite Instability ; Colorectal Neoplasms/diagnosis* ; Microsatellite Repeats/genetics* ; DNA Mismatch Repair

Light adaptation enables the vertebrate visual system to operate over a wide range of ambient illumination. Regulation of phototransduction in photoreceptors is considered a major mechanism underlying light adaptation. However, various types of neurons and glial cells exist in the retina, and whether and how all retinal cells interact to adapt to light/dark conditions at the cellular and molecular levels requires systematic investigation. Therefore, we utilized single-cell RNA sequencing to dissect retinal cell-type-specific transcriptomes during light/dark adaptation in mice. The results demonstrated that, in addition to photoreceptors, other retinal cell types also showed dynamic molecular changes and specifically enriched signaling pathways under light/dark adaptation. Importantly, Müller glial cells (MGs) were identified as hub cells for intercellular interactions, displaying complex cell‒cell communication with other retinal cells. Furthermore, light increased the transcription of the deiodinase Dio2 in MGs, which converted thyroxine (T4) to active triiodothyronine (T3). Subsequently, light increased T3 levels and regulated mitochondrial respiration in retinal cells in response to light conditions. As cones specifically express the thyroid hormone receptor Thrb, they responded to the increase in T3 by adjusting light responsiveness. Loss of the expression of Dio2 specifically in MGs decreased the light responsive ability of cones. These results suggest that retinal cells display global transcriptional changes under light/dark adaptation and that MGs coordinate intercellular communication during light/dark adaptation via thyroid hormone signaling.
Animals ; Mice ; Dark Adaptation ; Light ; Retina ; Retinal Cone Photoreceptor Cells/metabolism* ; Adaptation, Ocular ; Neuroglia/physiology* ; Cell Communication ; Thyroid Hormones

In the original publication the grant number is incorrectly published. The correct grant number should be read as "17140901600". The corrected contents are provided in this correction article. This work was partially supported by grants from the National Natural Science Foundation of China (Nos. 81670470 and 81600149), a grant from the Shanghai Municipal Commission for Science and Technology (17140901600, 18411953500 and 15JC1400201) and a grant from National Key Research and Development Program (2016YFC0905100).