Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 95
Filter
1.
Acta Derm Venereol ; 103: adv6226, 2023 Aug 22.
Article in English | MEDLINE | ID: mdl-37606155

ABSTRACT

Hypopigmented mycosis fungoides is a rare form of mycosis fungoides that is characterized by achromic lesions, early onset of disease, a predilection for darker skinned populations, and a predominance of CD8+ T cells. Due to the rarity and heterogeneous presentation of hypopigmented mycosis fungoides, there are no criteria that clearly define the clinical characteristics and treatment regimens for this condition. This retrospective study of 44 paediatric patients with hypopigmented mycosis fungoides aimed to summarize their epidemiological and clinical characteristics and assess the effectiveness and safety of different treatment regimens. Clinical manifestations were further classified into 3 morphological groups: hypopigmented lesions, papules overlying hypopigmented lesions, and erythematous plaques overlying hypopigmented lesions. In addition, the results of this study suggest that interferon alpha might be an effective and well-tolerated therapy that could shorten the treatment time to complete response compared with other treatments. Maintenance therapy and long-term follow-up reduced the recurrence rate.


Subject(s)
Mycosis Fungoides , Skin Neoplasms , Humans , Child , Retrospective Studies , Mycosis Fungoides/drug therapy , CD8-Positive T-Lymphocytes , Patients , Skin Neoplasms/drug therapy
2.
Oral Dis ; 2023 Jun 25.
Article in English | MEDLINE | ID: mdl-37357358

ABSTRACT

OBJECTIVE: Obesity can affect periodontal tissues and exacerbate periodontitis. Pyroptosis, a newly identified type of inflammatory cell death, is involved in the development of periodontal inflammation. The saturated fatty acid palmitic acid (PA) is elevated in obese patients. The effect of PA on pyroptosis in periodontal ligament cells (PDLCs) and its underlying mechanisms remain unknown. MATERIALS AND METHODS: Human PDLCs were isolated from healthy individuals and cultured for experiments. The effects of PA on PDLC pyroptosis and the underlying mechanisms were examined by transmission electron microscopy, quantitative real-time PCR and western blotting. RESULTS: The morphology of PDLCs in the PA group indicated pyroptotic characteristics, including swollen cells, plasma membrane rupture and changes in subcellular organelles. PA induced inflammatory responses in PDLCs, as indicated by an increase in IL-1ß in the cell culture supernatant. Furthermore, we found that the pyroptosis-related proteins caspase-1, caspase-4 and GSDMD were involved in PA-induced cell death. GSDMD and caspase-4 inhibitors alleviated pyroptotic death of PDLCs. Moreover, PA promoted NF-κB P65 phosphorylation. A NF-κB inhibitor decreased IL-1ß expression and partly rescued cell death induced by PA. CONCLUSION: PA activated the NF-κB pathway and induced the inflammatory response in PDLCs. Caspase-4/GSDMD mediated PDLC pyroptosis induced by PA.

3.
Angew Chem Int Ed Engl ; 62(16): e202300654, 2023 Apr 11.
Article in English | MEDLINE | ID: mdl-36811228

ABSTRACT

A series of vanadyl complexes bearing 3-t-butyl-5-bromo, 3-aryl-5-bromo, 3,5-dihalo-, and benzo-fused N-salicylidene-tert-leucinates was examined as catalysts for 1,2-alkoxy-phosphinoylation of 4-, 3-, 3,4-, and 3,5-substituted styrene derivatives (including Me/t-Bu, Ph, OR, Cl/Br, OAc, NO2 , C(O)Me, CO2 Me, CN, and benzo-fused) with HP(O)Ph2 in the presence of t-BuOOH (TBHP) in a given alcohol or cosolvent with MeOH. The best scenario involved the use of 5 mol % 3-(2,5-dimethylphenyl)-5-Br (i.e., 3-DMP-5-Br) catalyst at 0 °C in MeOH. The desired catalytic cross coupling reactions proceeded smoothly with enantioselectivities of up to 95 % ee of (R)-configuration as confirmed by X-ray crystallographic analysis of several recrystallized products. The origin of enantiocontrol and homolytic substitution of the benzylic intermediates by vanadyl-bound methoxide and radical type catalytic mechanism were proposed.

4.
J Cell Mol Med ; 26(16): 4401-4415, 2022 08.
Article in English | MEDLINE | ID: mdl-35775112

ABSTRACT

Lung adenocarcinoma (LUAD) is the most challenging neoplasm to treat in clinical practice. Ankyrin repeat domain 49 protein (ANKRD49) is highly expressed in several carcinomas; however, its pattern of expression and role in LUAD are not known. Tissue microarrays, immunohistochemistry, χ2 test, Spearman correlation analysis, Kaplan-Meier, log-rank test, and Cox's proportional hazard model were used to analyse the clinical cases. The effect of ANKRD49 on the LUAD was investigated using CCK-8, clonal formation, would healing, transwell assays, and nude mice experiment. Expressions of ANKRD49 and its associated downstream protein molecules were verified by real-time PCR, Western blot, immunohistochemistry, and/or immunofluorescence analyses. ANKRD49 expression was highly elevated in LUAD. The survival rate and Cox's modelling analysis indicated that there may be an independent prognostic indicator for LUAD patients. We also found that ANKRD49 promoted the invasion and migration in both in in vitro and in vivo assays, through upregulating matrix metalloproteinase (MMP)-2 and MMP-9 activities via the P38/ATF-2 signalling pathway Our findings suggest that ANKRD49 is a latent biomarker for evaluating LUAD prognosis and promotes the metastasis of A549 cells via upregulation of MMP-2 and MMP-9 in a P38/ATF-2 pathway-dependent manner.


Subject(s)
Adenocarcinoma of Lung , Lung Neoplasms , Muscle Proteins/metabolism , Activating Transcription Factor 2/metabolism , Adenocarcinoma of Lung/genetics , Adenocarcinoma of Lung/metabolism , Animals , Cell Line, Tumor , Cell Movement/genetics , Cell Proliferation , Gene Expression Regulation, Neoplastic , Lung Neoplasms/pathology , Matrix Metalloproteinase 9/metabolism , Mice , Mice, Nude , Signal Transduction
5.
J Craniofac Surg ; 27(2): 405-9, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26872281

ABSTRACT

Sixty-nine experienced Chinese orthodontists evaluated 108 Chinese patients' facial attractiveness from set of photographs (frontal, lateral, and frontal smiling photos) taken at the end of orthodontic treatment. These 108 patients, which contained an equal number of patients with Class I, II, and III malocclusion, were randomly selected from 6 orthodontic treatment centers throughout China. Spearman rank-order correlation coefficients (rs) analyses were performed to examine agreement in ranking between all judge pairs. Pearson correlation and multivariate regression were performed to examine the correlation between cephalometric measures and end-of-treatment Photo Attractiveness Rank.96.68% judge pairs showed moderate correlated (+0.4 ≤ rs < +0.7) subjective rankings. Cephalometric measures significantly correlated with end-of-treatment Photo Attractiveness Rank included interincisal angle (r = 0.330, P < 0.05), L1/MP° (r = 0.386, P < 0.05), L1-NBmm (r = 0.451, P < 0.01), L1/NB° (r = 0.374, P < 0.05), and profile angle (r = 0.353, P < 0.05) in Class I patients with an explained variance of 32.8%, and ANB angle (r = 0.432, P < 0.01), angle of convexity (r = 0.448, P < 0.01), profile angle (r = 0.488, P < 0.01), Li to E-line (r = 0.374, P < 0.05), Li to B-line (r = 0.543, P < 0.01), and Z angle (r = 0.543, P < 0.01) in Class II patient with an explained variance of 43.3%.There was less association than expected between objective measurements on the lateral cephalograms and clinicians' rankings of facial attractiveness on clinical photography in Chinese patients. Straight-stand lower incisor was desired for facial attractiveness of Class I malocclusion; and sagittal relationship and lip prominence influence the esthetics of Class II malocclusion in Chinese population.


Subject(s)
Cephalometry/methods , Esthetics, Dental , Face/anatomy & histology , Malocclusion/therapy , Adolescent , Adult , Child , China , Female , Humans , Male , Malocclusion/diagnosis , Smiling , Young Adult
7.
Dermatol Ther ; 27(4): 227-9, 2014.
Article in English | MEDLINE | ID: mdl-24673843

ABSTRACT

A cutaneous lymphoproliferative disorder, localized pagetoid reticulosis (LPR), is rare but distinctive in its clinical and histopathological manifestations. Without an evidence-based medicine treatment guideline because of extremely low incidence, LPR poses a therapeutic challenge. We describe a 67-year-old Chinese woman with LRP who showed complete response to narrow-band ultraviolet B combined with intramuscular interferon alpha-2b.


Subject(s)
Interferon-alpha/therapeutic use , Pagetoid Reticulosis/therapy , Skin Neoplasms/therapy , Ultraviolet Therapy/methods , Aged , Combined Modality Therapy , Female , Humans , Interferon alpha-2 , Interferon-alpha/administration & dosage , Pagetoid Reticulosis/pathology , Recombinant Proteins/administration & dosage , Recombinant Proteins/therapeutic use , Skin Neoplasms/pathology , Treatment Outcome
8.
Chin Med Sci J ; 29(1): 33-7, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24698676

ABSTRACT

OBJECTIVE: To determine the efficacy of palliative radiotherapy in treating tumor-stage cutaneous T-cell lymphoma/mycosis fungoides (MF). METHODS: From January 2008 to January 2013, a total of 11 patients with tumor-stage MF were treated with local radiation therapy in Peking Union Medical College Hospital. The median age of these patients was 53.36 ± 14.45 years. Female-male ratio was 1:1.2. The average course of disease was 10.82 ± 3.37 years. All the patients were treated with local electronic beam irradiation with a total median dosage of 48.55 ± 9.51 (40-74) Gy in an average of 24.55 ± 5.57 (20-40) fractions, 5 fractions per week. RESULTS: The median follow-up time was 55.27 ± 29.3 (13-103) months. No severe acute or chronic side effects of irradiation were observed. Complete clinical response (CR) rate of the radiated sites was 54.5% (6/11), partial response (PR) rate was 36.4% (4/11), and the overall response rate (CR+PR) was 90.9%. One patient showed no response. CONCLUSION: Local radiotherapy with psolaren plus ultraviolet A and/or interferon maintaining treatment is an effective palliative therapy in the treatment of tumor-stage MF patients.


Subject(s)
Mycosis Fungoides/radiotherapy , Palliative Care/methods , Skin Neoplasms/radiotherapy , Adult , Aged , Antineoplastic Agents/administration & dosage , Antineoplastic Agents/therapeutic use , Chemoradiotherapy, Adjuvant/methods , Disease-Free Survival , Female , Humans , Interferons/administration & dosage , Interferons/therapeutic use , Lymphoma, T-Cell, Cutaneous/drug therapy , Lymphoma, T-Cell, Cutaneous/pathology , Lymphoma, T-Cell, Cutaneous/radiotherapy , Male , Middle Aged , Mycosis Fungoides/drug therapy , Mycosis Fungoides/pathology , Neoplasm Staging , PUVA Therapy/methods , Radiotherapy Dosage , Skin Neoplasms/drug therapy , Skin Neoplasms/pathology , Treatment Outcome
9.
Zhonghua Yi Xue Za Zhi ; 93(32): 2529-33, 2013 Aug 27.
Article in Zh | MEDLINE | ID: mdl-24351590

ABSTRACT

OBJECTIVE: To evaluate the distribution of four IgG subclasses targeting NC16A domain of BP180 in bullous pemphigoid (BP) patients by developing and optimizing a detection method of anti-BP180NC16A IgG subclasses so as to assess its sensitivity and specificity. METHODS: Enzyme-linked immunosorbent assay (ELISA) was developed with recombinant GST-BP180NC16A proteins generated by a bacterial expression system. And 136 BP sera and 20 healthy control sera from our hospital between 2009 and 2012 were tested by ELISA, and the cutoff value of four IgG subclasses was set at an A reading corresponding to the mean value plus 3 times of standard deviation of 20 healthy controls sera. Western blot was also used to detect the IgG subclasses in patients with four positive IgG subclasses by ELISA. RESULTS: The cutoff value of specific IgG1, IgG2, IgG3 and IgG4 were 0.113,0.196,0.154 and 0.120. The values of four IgG subclasses from 20 healthy controls were lower than the corresponding cutoff value, making the detection system good specificity. The positive rates of anti-BP180NC16A IgG1, IgG2, IgG3 and IgG4 antibody were 67.6% (92/136) , 45.6% (62/136), 50.7% (69/136) and 54.4% (74/136) respectively in 136 BP sera. All four IgG subclasses were positive in 29 BP sera, accounting for 21.3%. The number of BP sera positive for at least one IgG subclass were 112, accounting for 82.4%, indicating that the combined sensitivity of four IgG subclasses was 82.4%. Western blot revealed that the number of positivity was 15 and 14 for IgG1 and IgG4 respectively in 20 BP patients with four IgG subclasses positive with ELISA. CONCLUSION: The specificity of ELISA is excellent while its sensitivity needs further improvements.


Subject(s)
Immunoglobulin G/blood , Pemphigoid, Bullous/blood , Adult , Aged , Aged, 80 and over , Case-Control Studies , Enzyme-Linked Immunosorbent Assay , Female , Humans , Immunoglobulin G/classification , Male , Middle Aged , Sensitivity and Specificity , Young Adult
10.
Respir Physiol Neurobiol ; 308: 103980, 2023 02.
Article in English | MEDLINE | ID: mdl-36273780

ABSTRACT

Obstructive sleep apnea (OSA) is a sleep-related breathing disorder characterized by intermittent and recurrent upper airway collapse during sleep that leads to chronic intermittent hypoxia (CIH). The genioglossus (GG) is the largest dilator muscle, which controls the upper airway and plays an important role in OSA pathology. Elucidating its genetic alterations may help identify potential targets for OSA. However, the genetic aspects of the GG in CIH mice remain unclear. Here, we have conducted an RNA sequencing (RNA-Seq) analysis to assess the differentially expressed genes (DEGs) in the GG between CIH mice and normoxia (NOR) mice. A total of 637 DEGs were identified to be dysregulated in CIH mice compared with control mice. Bioinformatics analysis showed that the DEGs were related to various physiological processes, such as the endogenous stimulus responses, cellular component organization and metabolic processes. Extracellular matrix (ECM)-receptor interaction was the top KEGG pathway in the environmental information processing category with high significance and large fold changes. From the gene weight distributions of collagen (Col)-related biological processes (BPs), we found several significant DEGs, such as Col1a1, Col1a2, Mmp2, Col3a1, Col5a1, Fmod, and Col5a2. A PPI network showed that Col1a1 was linked to ECM-receptor interactions, responses to reactive oxygen species (ROS) and Col-related BPs. It was verified in vivo and in vitro that hypoxia can induce excess ROS and reduce Col expression levels. Moreover, we found NAC can effectively scavenge ROS and restore collagen synthesis. These findings contribute to a better understanding of the mechanisms linking OSA and upper airway muscle injury and may help identify potential therapeutic targets.


Subject(s)
Sleep Apnea, Obstructive , Transcriptome , Mice , Animals , Reactive Oxygen Species/metabolism , Hypoxia , Fibromodulin
11.
Appl Immunohistochem Mol Morphol ; 30(6): 418-424, 2022 07 01.
Article in English | MEDLINE | ID: mdl-35639405

ABSTRACT

Lung squamous cell carcinoma (LUSC) is associated with poor clinical outcomes and identifying novel biomarkers that are involved in the progression of LUSC is important for prognosis and targeted treatment. Herein, ankyrin repeat domain 49 (ANKRD49) protein in LUSC versus paired noncancerous lung tissues was tested and its clinical significance was evaluated through χ 2 test, log-rank test, and Cox proportional hazards model. The results showed the ANKRD49 protein in LUSC was elevated and correlated with the tumor-node-metastasis stage, lymph node metastasis, distal metastasis, and differentiation. Patients with higher ANKRD49 had lower overall survival rate and higher ANKRD49 expression in lung tissues may be used as an independent prognostic marker for LUSC patients.


Subject(s)
Carcinoma, Non-Small-Cell Lung , Carcinoma, Squamous Cell , Lung Neoplasms , Biomarkers, Tumor , Carcinoma, Non-Small-Cell Lung/pathology , Carcinoma, Squamous Cell/pathology , Humans , Kaplan-Meier Estimate , Lung/pathology , Lung Neoplasms/pathology
12.
Eur J Oral Sci ; 119(2): 128-35, 2011 Apr.
Article in English | MEDLINE | ID: mdl-21410552

ABSTRACT

Chronic intermittent hypoxia (CIH) is a frequent feature of obstructive sleep apnea/hypopnea syndrome (OSAHS), and it may alter upper airway muscle endurance. We have previously reported the positive effects of estrogen on genioglossus fatigue resistance in rats. Our present study was designed to evaluate the effects of two phytoestrogens - genistein and coumestrol - on genioglossus contractile function and estrogen receptor (ER) expression in female rats exposed to CIH. Eight-wk-old female rats were ovariectomized and exposed to CIH for 5 wk. Genistein and coumestrol, respectively, were administered by intraperitoneal injection, at a dose of 2.5 mg kg(-1) d(-1), during the last 4 d of exposure to CIH. The contractile properties of the genioglossus were measured. Real-time RT-PCR and western blotting were performed to determine the expression of ERs in the genioglossus. Phytoestrogens were found to significantly increase genioglossus fatigue resistance, the effect of genistein being more powerful than that of coumestrol. However, higher levels of ER mRNA and protein were detected in the coumestrol group than in the genistein group. We conclude that phytoestrogens, especially genistein, could improve the endurance of the genioglossus muscle in ovariectomized rats exposed to CIH, and this effect is, in part, not related to its estrogenic action.


Subject(s)
Coumestrol/pharmacology , Genistein/pharmacology , Muscle Contraction/drug effects , Muscle, Skeletal/drug effects , Phytoestrogens/pharmacology , Sleep Apnea, Obstructive/metabolism , Analysis of Variance , Animals , Chronic Disease , Disease Models, Animal , Female , Hypoxia/complications , Hypoxia/physiopathology , Muscle Contraction/physiology , Muscle, Skeletal/metabolism , RNA, Messenger/analysis , Rats , Rats, Sprague-Dawley , Receptors, Estrogen/drug effects , Receptors, Estrogen/genetics , Receptors, Estrogen/metabolism , Sleep Apnea, Obstructive/complications , Sleep Apnea, Obstructive/drug therapy , Tongue
13.
Drug Dev Ind Pharm ; 37(7): 868-74, 2011 Jul.
Article in English | MEDLINE | ID: mdl-21231900

ABSTRACT

Particulate systems that could deliver drug specifically to duodenum have not yet been reported. The aim of this study was to develop a novel duodenum-specific drug delivery system based on thiolated chitosan and hydroxypropyl methylcellulose acetate maleate (HPMCAM) for the duodenal ulcer application. Berberine hydrochloride was used as model drug. Thiolated chitosan was synthesized and further used for the preparation of mucoadhesive microspheres. HPMCAM, which is insoluble below pH 3.0 was synthesized and used for the coating of thiolated chitosan microspheres (TCM). The resulting thiolated chitosan immobilized on chitosan was 268.21 ± 18 µmol/g. In vitro mucoadhesion study showed that the mucoadhesion property of TCM was better than that of chitosan microspheres. Morphological observation showed that the HPMCAM coating would maintain its integrity in simulated gastric fluid (SGF) for 2 h and dissolved quickly in simulated pathological duodenal fluid (SPDF; pH 3.3). In vitro drug release studies showed that only 4.75% of the drug was released in SGF for 2 h, while nearly 90% of the drug was released within 6 h after transferring into SPDF.


Subject(s)
Drug Delivery Systems/methods , Duodenum/drug effects , Adhesiveness , Berberine/administration & dosage , Chitosan , Duodenal Ulcer/drug therapy , Duodenum/metabolism , Humans , Hydrogen-Ion Concentration , Hypromellose Derivatives , In Vitro Techniques , Intestinal Mucosa/drug effects , Intestinal Mucosa/metabolism , Methylcellulose/analogs & derivatives , Microscopy, Electron, Scanning , Microspheres , Tablets, Enteric-Coated
14.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 33(5): 525-8, 2011 Oct.
Article in Zh | MEDLINE | ID: mdl-22338136

ABSTRACT

OBJECTIVE: To explore the clinical and histopathological manifestations, therapy and prognosis of lupus erythematosus panniculitis (LEP). METHOD: We retrospectively reviewed the clinical data and histopathological features of 22 cases of LEP diagnosed at Peking Union Medical College Hospital from January 2008 to February 2010. RESULTS: The lesions appeared as atrophy, erythema, subcutaneous nodules, infiltrated erythema, and ulceration over the scalp, face, upper limbs, and buttock. Histopathological features were lobular panniculitis in the subcutaneous fat; sometimes septal panniculitis could be seen. Hydroxychloroquine sulfate and corticosteroid were effective treatment; most patients responded well to the treatment, while a few experienced recurrence when the treatment tapped or discontinued. CONCLUSIONS: LEP is a rare cutaneous variant of lupus erythematosus. The diagnosis of LEP is mainly based on clinical findings and pathological features. Hydroxychloroquine and low- and middle-dose corticosteroid are effective for the treatment of LEP.


Subject(s)
Panniculitis, Lupus Erythematosus/drug therapy , Panniculitis, Lupus Erythematosus/pathology , Adult , Aged , Female , Humans , Male , Middle Aged , Prognosis , Retrospective Studies , Young Adult
15.
Shanghai Kou Qiang Yi Xue ; 30(4): 389-393, 2021 Aug.
Article in Zh | MEDLINE | ID: mdl-34693432

ABSTRACT

PURPOSE: This study investigated the effectiveness of orofacial myofunctional therapy(OMT) in improving facial morphology of children with obstructive sleep apnea (OSA) after adenotonsillectomy (AT). METHODS: Ten children aged from 4-7 years with persistent oral breathing for more than 1 month after adenotonsillectomy were chosen to receive orofacial myofunctional therapy. The patients were required to take photos before and after orofacial myofunctional therapy. In order to compare the soft changes before and after OMT treatment, twelve representative mark points were selected and used for proportion and angle measurements. Graphpad Prism 8 statistical software was used for statistical analysis, to compare the differences in facial morphology of patients before and after treatment. RESULTS: Compared with before OMT, a significant difference was found in the proportion of Sn-Ls/Sn-Stms(P=0.0002), Sn-Stms/Sn-Me'(P<0.05), as well as in the angle of Gs-Sn-Pos (P<0.05), nasolabial angle(P=0.0005), mentolabial angle (P=0.0026) after OMT treatment. CONCLUSIONS: Orofacial myofunctional therapy can be considered as an effective complementary treatment for OSA patients with oral breathing after adenotonsillectomy.


Subject(s)
Sleep Apnea, Obstructive , Tonsillectomy , Adenoidectomy , Child , Face , Humans , Myofunctional Therapy , Sleep Apnea, Obstructive/therapy
16.
Shanghai Kou Qiang Yi Xue ; 30(2): 129-134, 2021 Apr.
Article in Zh | MEDLINE | ID: mdl-34109349

ABSTRACT

PURPOSE: The goal of this investigation was to measure and analyze the root position of palatally malposed maxillary lateral incisor based on cone-beam CT(CBCT)images, in order to provide references for orthodontists to move this kind of teeth scientifically. METHODS: CBCT data from 200 patients meeting the selection criteria with palatally malposed maxillary lateral incisor were investigated in this study. The root was divided into eight equal parts by length, then T1 to T8 were orderly pointed from root apex to alveolar ridge crest. The labial and palatal bone thickness at each point was measured; meanwhile, the angle between the long axis of the tooth and that of the alveolar bone was measured.The data was analyzed using SPSS 19.0 software package. RESULTS: The mean labial bone thicknesses at all researched points were less than 1.00 mm, except for point T1,T7 and T8. The mean labial bone thicknesses at point T3, T4 and T5 were the thinnest, which were all less than 0.5 mm(P<0.05). The mean thicknesses of labial bone gradually increased from T4 to T8(P<0.05). The mean palatal bone thicknesses were all more than 1.00 mm at the eight points,the mean thicknesses of palatal bone gradually increased from T8 to T1(P<0.05). All the angulations between the long axes of teeth and those of the alveolar bone were negative, indicating the root was close to the labial alveolar wall. The average angulation was minus 31.06 degrees. CONCLUSIONS: Results suggest that the root of palatally malposed maxillary lateral incisor is close to the labial wall of the alveolar bone, its labial alveolar bone is frequently quite thin or even deficient, especially in the zone between 1/4 root length to the root apex and the mid-root. If we move the palatally malposed maxillary lateral incisor labially, it is better to choose tipping movement, instead of bodily movement, in order to avoid serious bone fenestration and dehiscence or root absorption.


Subject(s)
Incisor , Maxilla , Alveolar Process/diagnostic imaging , Cone-Beam Computed Tomography , Humans , Incisor/diagnostic imaging , Maxilla/diagnostic imaging , Palate
17.
Int Immunopharmacol ; 99: 107901, 2021 Oct.
Article in English | MEDLINE | ID: mdl-34273637

ABSTRACT

Periodontitis is initiated by serious and sustained bacterial infection and ultimately results in chronic immune-mediated inflammation, tissue destruction, and bone loss. The pathogenesis of periodontitis remains unclear. Host immunological responses to periodontal bacteria ultimately determine the severity and mechanisms governing periodontitis progression. This study aimed to clarify the effect of the hypoxia-inducible factor-1α (HIF-1α) activator dimethyloxalylglycine (DMOG) on a mouse periodontitis model and its underlying role in macrophage polarization. qRT-PCR analysis showed that DMOG inhibited the M1-like polarization of both RAW264.7 macrophages and murine bone marrow macrophages (BMMs) and downregulated TNF-α, IL-6, CD86, and MCP-1 expression in vitro. Immunofluorescence staining and flow cytometry also confirmed the less percentage of F4/80 + CD86 + cells after DMOG treatment. The phosphorylation of NF-κB pathway was also inhibited by DMOG with higher level of HIF-1α expression. Furthermore, mice treated with DMOG showed decreased alveolar bone resorption in the experimental periodontitis model, with significant increases in alveolar bone volume/tissue volume (BV/TV) and bone mineral density (BMD). DMOG treatment of mice decreased the ratio of M1/M2 (CD86+/CD206+) macrophages in periodontal tissues, resulting in the downregulation of proinflammatory cytokines such as TNF-α and IL-6 and increased levels of anti-inflammatory factors such as IL-4 and IL-10. DMOG treatment promoted the number of HIF-1α-positive cells in periodontal tissues. This study demonstrated the cell-specific roles of DMOG in macrophage polarization in vitro and provided insight into the mechanism underlying the protective effect of DMOG in a model of periodontitis.


Subject(s)
Alveolar Bone Loss/drug therapy , Amino Acids, Dicarboxylic/therapeutic use , Macrophages/drug effects , Periodontitis/drug therapy , Alveolar Bone Loss/diagnostic imaging , Alveolar Bone Loss/immunology , Alveolar Bone Loss/pathology , Amino Acids, Dicarboxylic/pharmacology , Animals , Cytokines/genetics , Hypoxia-Inducible Factor 1, alpha Subunit , Macrophages/immunology , Male , Maxilla/diagnostic imaging , Maxilla/pathology , Mice , Mice, Inbred C57BL , NF-kappa B/immunology , Periodontitis/diagnostic imaging , Periodontitis/immunology , Periodontitis/pathology , RAW 264.7 Cells , Signal Transduction/drug effects , X-Ray Microtomography
18.
Folia Parasitol (Praha) ; 682021 Jun 18.
Article in English | MEDLINE | ID: mdl-34180401

ABSTRACT

The apicomplexan Toxoplasma gondii (Nicolle et Manceaux, 1908) secretes a group of serine/threonine kinases from rhoptries, which play vital roles in boosting intracellular infection. Toxoplasma gondii rhoptry organelle protein 17 (ROP17) is one of these important kinase proteins. Nevertheless, its function remains unclear. Here, we showed that ROP17 induced autophagy in vitro and in vivo. The autophagy of small intestine tissues of T. gondii tachyzoite (RH strain)-infected mice was detected by the immunohistochemistry staining of LC3B, Beclin 1 and P62. ROP17 overexpression augmented starvation-induced autophagy in HEK 293T cells as measured by MDC staining, transmission electron microscopy (TEM), fluorescence microscopy and Western blot analysis. Moreover, the interaction of ROP17 and Bcl-2 was confirmed using co-immunoprecipitation analysis, and the data demonstrated that ROP17 had an autophagic role dependent on the Beclin 1-Bcl-2 pathway, which was also revealed in an in vivo model through immunohistochemical staining. Pearson coefficient analysis showed that there existed strong positive correlations between the expression of ROP17 and LC3B, Beclin 1 and phosphorylation of Bcl-2, while strong negative correlations between the expression of ROP17 and p62 and Bcl-2. Collectively, our findings indicate that ROP17 plays a pivotal role in maintaining T. gondii proliferation in host cells via the promotion of autophagy-dependent survival.


Subject(s)
Autophagy/genetics , Beclin-1/metabolism , Proto-Oncogene Proteins c-bcl-2/metabolism , Protozoan Proteins/genetics , Toxoplasma/physiology , Virulence Factors/genetics , Animals , HEK293 Cells , Humans , Mice , Protozoan Proteins/metabolism , Toxoplasma/genetics , Virulence Factors/metabolism
19.
Eur J Oral Sci ; 118(2): 139-44, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20487002

ABSTRACT

Patients with obstructive sleep apnea/hypopnea syndrome (OSAHS) often exhibit fatigued or inefficient upper airway dilator muscle activity. It has been shown that estrogen may have some impact on upper airway contractility under normoxic conditions. Chronic intermittent hypoxia (CIH) is a frequent feature of OSAHS, and it may alter muscle susceptibility to oxidative stress, a characteristic of a fatigable nature. Hypoxia inducible factor-1 (HIF-1) is a transcription factor that is responsible for the regulation of oxygen homeostasis under hypoxic conditions. We examined the effects of estrogen on the contractility of the genioglossus by exposing rats to alternating cycles of 6-8% O(2) every 15 s for a total duration of 35 d. The results showed that muscle fatigue resistance was significantly decreased after CIH but was partially reversed after estrogen treatment. Compared with the control group, real-time reverse transcription-polymerase chain reaction and western blotting showed higher levels of HIF-1alpha messenger RNA and protein in the CIH group, but estrogen treatment reduced, in a dose-independent manner, the levels of HIF-1alpha messenger RNA and protein in rats exposed to CIH. We conclude that CIH induced the expression of HIF-1alpha in the genioglossus and altered the physical properties towards a more fatigable phenotype, whereas estrogen inhibited the over-expression of HIF-1alpha, and this may account for the improvement of upper airway muscle endurance in CIH rats.


Subject(s)
Down-Regulation , Estrogens/therapeutic use , Hypoxia-Inducible Factor 1, alpha Subunit/analysis , Muscle Fatigue/drug effects , Protective Agents/therapeutic use , Tongue/drug effects , Animals , Disease Models, Animal , Dose-Response Relationship, Drug , Electric Stimulation , Estrogens/administration & dosage , Homeostasis/physiology , Hypoxia/physiopathology , Hypoxia-Inducible Factor 1, alpha Subunit/drug effects , Isometric Contraction/drug effects , Isometric Contraction/physiology , Male , Muscle Fatigue/physiology , Muscle Tonus/drug effects , Muscle Tonus/physiology , Oxygen Consumption/physiology , Phenotype , Protective Agents/administration & dosage , RNA, Messenger/analysis , Rats , Rats, Sprague-Dawley , Time Factors , Tongue/physiopathology , Transducers
20.
Zhonghua Yi Xue Za Zhi ; 90(46): 3287-90, 2010 Dec 14.
Article in Zh | MEDLINE | ID: mdl-21223789

ABSTRACT

OBJECTIVE: To explore the clinical and histopathological manifestations, therapy and prognosis of hypopigmented mycosis fungoides (HMF) in children. METHODS: Six pediatric cases of HMF from February 2008 to October 2009 were reviewed and analyzed at our hospital. RESULTS: There were 5 males and 1 female with a average age of 11 years old (range: 9-14). The lesions appeared poorly-demarcated hypopigmented macula and patches disseminated over the trunk and extremities, scales and infiltrated papules over the hypopigmented lesions or invasive erythemas arose and enlarged gradually. Histologically, there was an epidermal infiltration of atypical lymphocytes. The immunohistochemical staining revealed a pattern of T lymphoma and a predominance of CD8+ T cell. All patients were of T2N0M0/IB except for one at the stage of T1N0M0/IA. Two patients received narrow band ultraviolet B (NB-UVB), one NB-UVB plus alpha interferon, another NB-UVB plus alpha interferon and topical steroid, one Chinese traditional herbal regimen while the last one none. And NB-UVB alone or plus alpha interferon achieved a clinical complete response (CR). The herbal regimen failed to cure the lesions but achieved no response. The non-treated patient progressed gradually. The average follow-up was 16 months (range: 9-28). The progression-free rate was 83.3% and the overall survival rate 100%. CONCLUSIONS: Visceral and lymph note involvements are rare in HMF of children. The prognosis of early-stage treatment is satisfactory. NB-UVB alone or plus alpha interferon achieves a clinical CR in most early-stage patients.


Subject(s)
Hypopigmentation/pathology , Lymphoma, T-Cell, Cutaneous/pathology , Mycosis Fungoides/pathology , Skin Neoplasms/pathology , Adolescent , Child , Female , Humans , Hypopigmentation/therapy , Lymphoma, T-Cell, Cutaneous/therapy , Male , Mycosis Fungoides/therapy , Retrospective Studies , Skin Neoplasms/therapy
SELECTION OF CITATIONS
SEARCH DETAIL