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1.
Eur Rev Med Pharmacol Sci ; 25(21): 6731-6740, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34787878

ABSTRACT

OBJECTIVE: The aim of the study was to determine the association between platelet indices and disease severity, and outcomes of the patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in a secondary hospital. PATIENTS AND METHODS: 722 hospitalized patients who had positive rRT-PCR for SARS-CoV-2 and/or typical findings of COVID-19 at chest computed tomography (CT) were enrolled in this study. Initial platelet count (PLT) and indices, including mean platelet volume (MPV), platelet distribution width (PDW), plateletcrit (PCT), MPV/PCT, MPV/PLT, PDW/PLT, PDW/PCT on admission and the third day of hospitalization, and their relationship with disease severity and outcomes were evaluated retrospectively. RESULTS: The mean age of the patients was 57.2±15.6 years (range: 16-94) and male/female ratio was 1.22. 81.9% of the patients had moderate and 11.8% had severe disease. 1.8% of the patients had thrombocytopenia at admission. The patients transferred to the intensive care unit (ICU) had significantly lower baseline lymphocyte counts, PLT, PCT, and 3rd day lymphocyte counts when compared with the patients in wards. ICU patients also had higher baseline CRP, LDH, ferritin, MPV/PCT, MPV/PLT, PDW/PLT, PDW/PCT ratios, and 3rd day PDW, CRP, LDH, and ferritin levels than the patients in wards. Mortality was associated with lower baseline lymphocyte counts, PLT, PCT, 3rd day lymphocyte counts and PCT. Higher baseline CRP, LDH, ferritin, MPV/PCT, PDW/PLT, PDW/PCT and 3rd day CRP, LDH, ferritin, procalcitonin, PDW, MPV/PCT, PDW/PLT, and PDW/PCT ratios were also associated with poor prognosis. CONCLUSIONS: Platelet count and ratios were significantly associated with mortality in patients with COVID-19.


Subject(s)
Blood Platelets/cytology , COVID-19/pathology , Adolescent , Adult , Aged , Aged, 80 and over , Area Under Curve , COVID-19/mortality , COVID-19/virology , Female , Humans , Intensive Care Units , Male , Middle Aged , Platelet Count , Prognosis , ROC Curve , Retrospective Studies , SARS-CoV-2/isolation & purification , Severity of Illness Index , Survival Analysis , Young Adult
2.
Carbohydr Polym ; 265: 118066, 2021 Aug 01.
Article in English | MEDLINE | ID: mdl-33966830

ABSTRACT

This study aims to develop a novel intraperitoneal two- or three-layered patch with immunomodulatory property for treatment of hernia, regeneration of abdominal wall and prevention of intraperitoneal adhesions. Polypropylene (PP) mesh, middle layer, was intended to provide mechanical support whereas pullulan (PUL) hydrogel coating layer was designed to prevent intraperitoneal adhesions. Fibroin/chitosan oligosaccharide lactate (F/COS) layer electrospun on one side of pullulan was chosen for immunomodulation and abdominal wall regeneration. Physical and mechanical properties and regenerative capacity of intraperitoneal patches were determined. Immunomodulatory property of electrospun layer and whole patch was studied by determining nitric oxide amount produced by RAW 264.7 macrophages. 25 % (w/v) PUL hydrogel and F/COS with 90:10 (w/w) ratio yielded optimal results. Here, we report that fabricated intraperitoneal patches successfully prevented cell adhesion on one side and increased cell viability and proliferation on other side, along with immunomodulation, in vitro.


Subject(s)
Chitosan/pharmacology , Fibroins/pharmacology , Glucans/pharmacology , Hernia, Abdominal/surgery , Lactic Acid/pharmacology , Oligosaccharides/pharmacology , Tissue Adhesions/prevention & control , Abdominal Wall/pathology , Animals , Cell Adhesion/drug effects , Cell Survival/drug effects , Chitosan/chemistry , Fibroins/chemistry , Glucans/chemistry , Hernia, Abdominal/pathology , Humans , Hydrogels/chemistry , Hydrogels/pharmacology , Immunomodulation , Lactic Acid/chemistry , Mice , Oligosaccharides/chemistry , Peritoneum/pathology , Polypropylenes/chemistry , RAW 264.7 Cells , Surgical Mesh
3.
Leukemia ; 32(3): 752-764, 2018 03.
Article in English | MEDLINE | ID: mdl-29089645

ABSTRACT

X-box binding protein 1 (XBP1), CD138 (Syndecan-1) and CS1 (SLAMF7) are highly expressed antigens in cancers including multiple myeloma (MM). Here, we identify and characterize immunogenic HLA-A24 peptides derived from these antigens for potential vaccination therapy of HLA-A24+ patients with MM. The identified immunogenic HLA-A24-specific XBP1 unspliced (UN)185-193 (I S P W I L A V L), XBP1 spliced (SP)223-231 (V Y P E G P S S L), CD138265-273 (I F A V C L V G F) and CS1240-248 (L F V L G L F L W) peptides induced antigen-specific CTL with anti-MM activity in an HLA-A24 restricted manner. Furthermore, a cocktail containing the four HLA-A24 peptides evoked MM-specific CTL with distinct phenotypic profiles (CD28, CD40L, 41BB, CD38, CD69) and anti-tumor activities, evidenced by perforin upregulation, CD107a degranulation (cytotoxicity) and Th1-type cytokines (IFN-γ/IL-2/TNF-α) production in response to HLA-A24+ MM cells. The multipeptide-specific CTL included antigen-specific memory CD8+ T cells expressing both T-cell activation (CD38, CD69) and immune checkpoints antigens (CTLA, PD-1, LAG-3, TIM-3). These results provide the framework for a multipeptide vaccination therapy to induce tumor-specific CTL in HLA-A24-positive patients with myeloma and other cancers expressing these antigens.


Subject(s)
ADP-ribosyl Cyclase 1/immunology , HLA-A24 Antigen/immunology , Multiple Myeloma/immunology , Peptides/immunology , T-Cell Antigen Receptor Specificity/immunology , T-Lymphocytes, Cytotoxic/immunology , X-Box Binding Protein 1/immunology , ADP-ribosyl Cyclase 1/chemistry , ADP-ribosyl Cyclase 1/metabolism , Amino Acid Sequence , Biomarkers , Cell Line, Tumor , Cytokines/metabolism , Cytotoxicity, Immunologic , Epitopes, T-Lymphocyte/chemistry , Epitopes, T-Lymphocyte/immunology , Epitopes, T-Lymphocyte/metabolism , HLA-A24 Antigen/genetics , HLA-A24 Antigen/metabolism , Humans , Immunologic Memory , Intercellular Signaling Peptides and Proteins , Lymphocyte Activation/immunology , Multiple Myeloma/genetics , Multiple Myeloma/metabolism , Peptides/chemistry , Peptides/metabolism , Phenotype , Protein Binding , T-Lymphocytes, Cytotoxic/metabolism , X-Box Binding Protein 1/chemistry , X-Box Binding Protein 1/metabolism
4.
Acta Chir Orthop Traumatol Cech ; 84(6): 436-440, 2017.
Article in English | MEDLINE | ID: mdl-29351526

ABSTRACT

PURPOSE OF THE STUDY In this study, it was aimed to examine the preoperative and postoperative quality of life and psychiatric symptoms of the patients with primary coxarthrosis after total hip arthroplasty. MATERIAL AND METHODS 150 patients undergone total hip arthroplasty were involved in this study. The socio-demographical data form prepared by the researchers was utilized before and after the operation in order to demonstrate disease-related socio-demographical characteristics of the patient. The Quality of Life Scale Short Form (SF-36), Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), Harris Hip Score (HHS) and Visual Analog Scale (VSA) were implemented in the preoperative period and at 6th and 12th week after the operation. RESULTS Of the patients involved in study, 28.7% were male and 71.3% were female. Their mean age was 58.34±11.92 year. While statistically significant differences were found between the preoperative and postoperative periods in terms of physical function, physical role limitation, emotional role limitation, energy, social function, pain, and general health subscales of SF-36, no significant differences were found relating mental health subscale. In BAI, BDI, VAS, and HHS comparison, statistically significant differences were found between the preoperative and postoperative periods, except for BAI. CONCLUSIONS In this study, it was determined that primary coxarthrosis affects significantly the quality of the patients' lives in a negative way and can be accompanied by mental symptoms. After total hip arthroplasty, significant improvement was observed in quality of life, depression and pain scores. Key words: total hip prosthesis, quality of life, mental symptoms.


Subject(s)
Arthroplasty, Replacement, Hip/rehabilitation , Mental Disorders/etiology , Osteoarthritis, Hip/psychology , Osteoarthritis, Hip/surgery , Quality of Life , Adult , Aged , Depression/etiology , Female , Humans , Male , Middle Aged , Pain Measurement/methods , Pain, Postoperative , Psychiatric Status Rating Scales , Psychometrics , Visual Analog Scale
5.
Acta Chir Orthop Traumatol Cech ; 82(4): 293-5, 2015.
Article in English | MEDLINE | ID: mdl-26516734

ABSTRACT

PURPOSE OF THE STUDY: The aim of this study was to determine the changes in total antioxidant capacity (TAC) during the fracture healing process. MATERIAL AND METHODS: Twenty patients with isolated closed femoral fracture, between the ages 18 and 60 years, were included in the study. The control group was formed with healthy volunteers. Venous blood was drawn from the healthy volunteers once, and from the patients five times during 14 days after fracture. TAC was measured in the sera of these samples. RESULTS: In the patient group, the serum TAC was the highest in the first 6 hours, whereas there was a decreasing trend on the 3rd, 7th and 14th days, and an increasing trend on the 5th day. The mean serum TAC in all measurements of the patient group were lower than those in the control group. CONCLUSION: The present study suggests that TAC may be decreased in considerable amounts during the first 2 weeks of fracture healing.


Subject(s)
Antioxidants/metabolism , Femoral Fractures/blood , Adult , Antioxidants/therapeutic use , Case-Control Studies , Female , Femoral Fractures/drug therapy , Fracture Healing/physiology , Humans , Ischemia/metabolism , Male , Malondialdehyde/metabolism , Middle Aged , Oxidative Stress/physiology , Prospective Studies , Reactive Oxygen Species/blood
6.
Acta Clin Belg ; 69(4): 246-50, 2014 Aug.
Article in English | MEDLINE | ID: mdl-25012748

ABSTRACT

Angiogenesis plays an important role in the pathogenesis of inflammatory diseases, but the possible role of angiogenesis in Behçet's disease (BD) has not yet been studied. The aim of this study was to determine angiostatin levels in patients with BD and the role of angiogenesis in the pathogenesis of the disease. Thirty-seven patients with BD (mean age: 28·6±5·4 years, mean disease duration: 9·3±3·7 years) and 18 healthy controls were enrolled to the study. Twenty-four patients were in active and 13 patients were in inactive stage of the disease. The mean serum angiostatin level of patients with BD was 113·9±53·2 and 60·7±20·1 ng/ml in healthy controls. The mean serum angiostatin level was 142·7±43·1 ng/ml in active and 86·9±15·5 ng/ml in inactive patients with BD. Serum angiostatin levels were significantly high in patients with BD compared with healthy controls (P<0·001) and it was significantly high in active patients compared with inactive patients with BD (P<0·001). In inactive patients with BD, serum angiostatin concentrations were found to be higher compared with healthy controls (P<0·01). In active BD patients, the mean serum angiostatin level was correlated with the deep vein thrombosis (r = 0·482, P = 0·05), uveitis (r = 0·582, P = 0·01), and arthritis (r = 0·492, P = 0·05). According to these results; elevated serum angiostatin levels in patients with BD suggest the possible role of angiogenesis in the pathogenesis of the disease and its high levels in inactive Behçet's patients is related with the continuous activation of the disease even in the subclinical period.


Subject(s)
Angiostatins/blood , Behcet Syndrome/blood , Adult , Behcet Syndrome/etiology , Behcet Syndrome/pathology , Case-Control Studies , Female , Humans , Male , Middle Aged , Neovascularization, Pathologic/complications
7.
Acta Chir Orthop Traumatol Cech ; 81(6): 380-6, 2014.
Article in English | MEDLINE | ID: mdl-25651292

ABSTRACT

PURPOSE OF THE STUDY: The aim of this study was to evaluate comparatively the outcomes of pediatric displaced supracondylar fractures of humerus which were treated with either closed reduction and percutaneous pinning (CRPP) or open reduction and percutaneous pinning (ORPP). MATERIAL AND METHODS: The study included 100 children with displaced supracondylar fractures of the humerus, who were treated with either CRPP (group 1) or ORPP (group 2); the numbers of subjects in the study groups were equal. The treatment outcomes were assessed clinically and radiologically. RESULTS: Ninety-six percent excellent or good cosmetic results were achieved in both groups, and 94% / 90% excellent or good functional results were achieved in groups 1 and 2 (respectively). There was no signifiant difference between Baumann and humero-capitellar angles of intact and operated sides in both groups, but there was an average carrying angle difference of 2,96 degrees in the group 1 and 1,52 degrees in the group 2 and these differences were statistically signifiant. Five cases (10%) from each group had superfiial pin tract infection. Hypertrophic incision scar occurred in 6 (12%) patients performed ORPP. CONCLUSION: Both CRPP and ORPP are successful treatment methods in the management of non-complicated and non-comminuted displaced supracondylar fractures of the humerus in pediatric ages and their outcomes are similar. Incision scar and the long duration of operation are the disadvantages of open surgery. For fiing the fracture, placement of two K-wires from the medial and lateral aspects which cross each other is enough to achieve a good stability. In ORPP practices, lateral incision is a simple and reliable approach despite of the dissatisfying scar tissue formation.


Subject(s)
Fracture Fixation, Intramedullary/instrumentation , Fracture Fixation, Intramedullary/methods , Humeral Fractures/surgery , Bone Nails/adverse effects , Child , Child, Preschool , Female , Fracture Fixation, Intramedullary/adverse effects , Humans , Humeral Fractures/diagnostic imaging , Humeral Fractures/pathology , Infant , Male , Postoperative Complications , Radiography , Treatment Outcome
8.
J Mater Chem B ; 2(8): 999-1008, 2014 Feb 28.
Article in English | MEDLINE | ID: mdl-32261618

ABSTRACT

Delivery of growth factors and control of vascularization are prominent problems in regenerative medicine. Vascular endothelial growth factor (VEGF) has been used both in vitro and in vivo to promote angiogenesis but due to its short half-life its controlled delivery is a sought after method. In this study we present a new concept of degradable drug loaded nanoparticles entrapped into exponentially growing multilayer films. Through hydrolysis of the nanoparticles, the drug can be delivered over long periods in a controlled manner. Poly(ε-caprolactone) nanoparticles were loaded with VEGF and in turn the release of VEGF from a surface is controlled by a thick layer-by-layer polyelectrolyte film. Direct loading of VEGF inside the film was not efficient for long-term applications. When VEGF loaded nanoparticles were introduced into the film, the particles were equally distributed inside and were stable after several washes. Moreover, the presence of the film sustained the release of VEGF for 7 days. Addition of the nanoparticles to the film promoted endothelial cell proliferation, mainly due to the presence of VEGF. Mechanical properties of the film (Young's moduli) were also improved by the presence of nanoparticles. However, in the presence of the film loaded with nanoparticles and without any direct contact with this film, endothelial cell growth was also enhanced on polystyrene and on Transwell insert surfaces which demonstrates the effectiveness of the nanoparticles not only to improve the mechanical properties of the film but also to deliver active VEGF. An increase in nitric oxide levels as an indicator of endothelial cell activity was monitored and was correlated with the release of VEGF from the nanoparticle/film platform. Finally, such a system can be used as an auxiliary delivery body within implants to finely control the release of bioactive agent containing nanoparticles.

9.
Transplant Proc ; 45(7): 2845-8, 2013 Sep.
Article in English | MEDLINE | ID: mdl-23747187

ABSTRACT

Chronic lymphocytic leukemia (CLL) patients with 17p deletion comprise a challenging subgroup associated with poor overall survival. These patients should be treated with alternative strategies. Reduced-intensity conditioning (RIC) allogeneic stem cell transplantation (allo-SCT) can achieve long-term remission in this ultra-high-risk CLL group. Herein, we described a CLL patient with 17p deletion who developed Richter syndrome with extranodal involvement of the liver soon after RIC allo-SCT despite apparent acute graft-versus-host disease. The majority of chronic lymphocytic leukemia (CLL) patients respond well to chemoimmunotherapy. Patients who show ultra-high-risk genetics, such as 17p deletions, comprise a challenging subgroup of patients with poor response to chemoimmunotherapy and median life expectancy <2-3 years at the time of first-line treatment. Current treatment approaches for patients with 17p deletion include agents acting independently from the DNA damage pathway, such as alemtuzumab and high-dose corticosteroids. RIC allo-SCT for consolidation can achieve long-term remission in this ultra-high-risk CLL group.(1,2) Richter syndrome (RS) represents the clinicopathologic transformation of CLL to an aggressive lymphoma, most commonly diffuse large B-cell lymphoma (DLBCL).(3) RS appearing after allo-SCT can be managed by tapering of immunosuppression, followed by dose-escalated donor lymphocyte infusion titrated to the degree of leukemia response and graft-versus-host disease (GVHD) encountered.(4) Herein, we describe a CLL patient with 17p deletion who developed RS with extranodal involvement of the liver soon after RIC allo-SCT despite apparent acute GVHD (aGVHD).


Subject(s)
Chromosome Deletion , Chromosomes, Human, Pair 17 , Graft vs Host Disease , Leukemia, Lymphocytic, Chronic, B-Cell/therapy , Stem Cell Transplantation , Female , Humans , Leukemia, Lymphocytic, Chronic, B-Cell/genetics , Middle Aged , Syndrome
10.
Autoimmunity ; 45(1): 44-54, 2012 Feb.
Article in English | MEDLINE | ID: mdl-21923616

ABSTRACT

The major focus of this paper is to describe and evaluate current information on the role of natural killer cells (NK cells) in the pathogenesis of blistering diseases. Until now, only pemphigus vulgaris (PV) has been studied. One co-culture study demonstrated that CD4+ T cells from the peripheral blood or perilesional skin of patients with active disease proliferate and secrete cytokines in the presence of major histocompatibility class II-expressing NK cells loaded with antigenic desmoglein self-peptides. Another study showed that NK cells can contribute to a T helper type 2-biased immune response through impaired interleukins (IL)-12 signaling and upregulation of IL, IL-10 and IL-5. Although significant data on other blistering diseases are unavailable at present, some studies implicate NK cells in disease progression. For instance, information on the role of NK cells in psoriasis and their production of tumor necrosis factor-α (TNF-α) will be provided since several TNF-α-inhibitors are used in its treatment. Studies on alopecia areata are also included in this paper because NK cells seem to play a key role in its pathogenesis. This review highlights the potential importance of NK cells and NKT cells as members of the large repertoire of cells and soluble mediators that play a critical role in pathogenesis of blistering diseases and other autoimmune diseases involving the skin. Therefore, the authors advocate a greater focus and interest on the study of the interaction of NK cells and the skin.


Subject(s)
Autoimmune Diseases/immunology , Killer Cells, Natural/immunology , Skin Diseases, Vesiculobullous/immunology , Humans , Pemphigus/immunology
11.
Eur J Pharm Sci ; 43(4): 270-7, 2011 Jul 17.
Article in English | MEDLINE | ID: mdl-21575717

ABSTRACT

In this study, therapeutic effects of Vitamin K2, Raloxifene and their co-administration on bone, uterus, blood and weight profiles were investigated with an ovariectomized rat model. Forty Wistar rats were divided into five groups (n=8): Raloxifene (R), Vitamin K2 (K), Raloxifene+Vitamin K2 (R+K), ovariectomized controls (OVX) and Sham-operated controls (Sham). Treatment began 3 months after ovariectomy. Vitamin K2 and Raloxifene were administered 30 and 1.5 mg/kg/day separately and in combination five times per week for 12 weeks. All treatment groups had significantly higher ultimate strength and energy absorption capacity (P<0.05) than ovariectomized controls in both femur and tibia. Histological results showed that treatment groups had healthy lumen structure, whereas OVX had degeneration. Adverse effects which were seen in individual treatments (myometrium weakening in K, endometrium weakening in R, and ALP increase in group R) were not observed in the R+K group implying a synergistic effect of these two agents when they are co-administered. According to blood analysis, ALP values were significantly high in Raloxifene-only group (P<0.0001). This effect is suppressed in the co-administered group. In summary, the groups R, K and R+K had significantly higher ultimate strength and less susceptibility to fracture than ovariectomized controls. In summation, Vitamin K2 treated groups (either in single or combined with Raloxifene) had considerable biomechanical performance and reproductive tissue profile indicating that this agent is prospectively effective in osteoporosis management.


Subject(s)
Osteoporosis/drug therapy , Raloxifene Hydrochloride/administration & dosage , Vitamin K 2/administration & dosage , Animals , Blood Chemical Analysis , Bone Density/drug effects , Drug Therapy, Combination , Female , Femur/drug effects , Femur/pathology , Osteoporosis/blood , Osteoporosis/pathology , Ovariectomy/methods , Raloxifene Hydrochloride/adverse effects , Rats , Rats, Wistar , Tibia/drug effects , Tibia/pathology , Uterus/pathology , Vitamin K 2/adverse effects
12.
Clin Exp Immunol ; 162(2): 224-36, 2010 Nov.
Article in English | MEDLINE | ID: mdl-21069937

ABSTRACT

In this report,we present 15 patients with histological and immunopathologically proven pemphigus vulgaris (PV). After a mean of 80 months since the onset of disease, when evaluated serologically, they had antibodies typical of PV and pemphigoid (Pg). Similarly, 18 patients with bullous pemphigoid (BP) and mucous membrane pemphigoid (MMP) were diagnosed on the basis of histology and immunopathology.After a mean of 60 months since the onset of disease, when their sera were evaluated they were found to have Pg and PV autoantibodies. In both groups of patients the diseases were characterized by a chronic course, which included several relapses and recurrences and were non-responsive to conventional therapy. The major histocompatibility complex class II (MHC II) genes were studied in both groups of patients and phenotypes associated typically with them were observed. Hence, in 33 patients, two different pathogenic autoantibodies were detected simultaneously. The authors provide a computer model to show that each MHC II gene has relevant epitopes that recognize the antigens associated with both diseases. Using the databases in these computer models, the authors present the hypothesis that these two autoantibodies are produced simultaneously due to the phenomena of epitope spreading.


Subject(s)
Antibody Formation/immunology , Autoantibodies/immunology , Autoantigens/immunology , Genes, MHC Class II/immunology , Pemphigoid, Benign Mucous Membrane/immunology , Pemphigoid, Bullous/immunology , Pemphigus/immunology , Adult , Aged , Aged, 80 and over , Amino Acid Sequence , Antibody Formation/genetics , Antigens, Surface/immunology , Autoantibodies/blood , Autoantigens/genetics , Carrier Proteins/genetics , Carrier Proteins/immunology , Cytoskeletal Proteins/genetics , Cytoskeletal Proteins/immunology , Desmoglein 1/immunology , Desmoglein 3/genetics , Desmoglein 3/immunology , Dystonin , Epitopes, T-Lymphocyte/genetics , Epitopes, T-Lymphocyte/immunology , Female , Genes, MHC Class II/genetics , HLA-DQ Antigens/genetics , HLA-DQ Antigens/immunology , HLA-DQ beta-Chains , HLA-DR Antigens/genetics , HLA-DR Antigens/immunology , HLA-DRB1 Chains , Humans , Integrin alpha6/genetics , Integrin alpha6/immunology , Integrin beta4/genetics , Integrin beta4/immunology , Keratinocytes/immunology , Male , Middle Aged , Molecular Sequence Data , Nerve Tissue Proteins/genetics , Nerve Tissue Proteins/immunology , Non-Fibrillar Collagens/genetics , Non-Fibrillar Collagens/immunology , Pemphigoid, Benign Mucous Membrane/genetics , Pemphigoid, Bullous/genetics , Pemphigus/genetics , Software , Young Adult , Collagen Type XVII
13.
J Mater Sci Mater Med ; 21(1): 295-308, 2010 Jan.
Article in English | MEDLINE | ID: mdl-19756968

ABSTRACT

The objective of this study was to improve the efficacy of polycaprolactone/bioglass (PCL/BG) bone substitute using demineralized bone matrix (DBM) or calcium sulfate (CS) as a third component. Composite discs involving either DBM or CS were prepared by compression moulding. Bioactivity of discs was evaluated by energy dispersive X-ray spectroscopy (ESCA) and scanning electron microscopy (SEM) following simulated body fluid incubation. The closest Calcium/Phosphate ratio to that of hydroxyl carbonate apatite crystals was observed for PCL/ BG/DBM group (1.53) after 15 day incubation. Addition of fillers increased microhardness and compressive modulus of discs. However, after 4 and 6-week PBS incubations, PCL/BG/DBM discs showed significant decrease in modulus (from 266.23 to 54.04 and 33.45 MPa, respectively) in parallel with its highest water uptakes (36.3 and 34.7%). Discs preserved their integrity with only considerable weight loss (7.5-14.5%) in PCL/BG/DBM group. In vitro cytotoxicity tests showed that all discs were biocompatible.


Subject(s)
Bone Matrix/physiology , Calcium Sulfate/pharmacology , Ceramics/chemistry , Polyesters/chemistry , Absorbable Implants , Animals , Bone Demineralization Technique , Bone Density/physiology , Bone Matrix/chemistry , Bone Substitutes/chemistry , Calcium Sulfate/chemistry , Calcium Sulfate/pharmacokinetics , Cells, Cultured , Hardness Tests , Humans , Male , Models, Biological , Nanocomposites/chemistry , Rabbits , Surface Properties
14.
B-ENT ; 4(1): 19-24, 2008.
Article in English | MEDLINE | ID: mdl-18500017

ABSTRACT

OBJECTIVE: Rheumatoid arthritis is a systemic autoimmune disorder that involves many body joints including the temporomandibular joint. The frequency of temporomandibular joint involvement based on clinical and radiological findings is rather diverse and involvement may manifest as pain, restricted range of movement and locking of the joint. The aim of this study is to investigate and correlate the clinical, laboratory and magnetic resonance imaging findings in patients with rheumatoid arthritis. METHODOLOGY: The temporomandibular joint involvement in 43 patients with rheumatoid arthritis, whose diagnoses were based on the revised 1987 criteria of the American College of Rheumatology, were evaluated using clinical examination, laboratory findings and magnetic resonance imaging. RESULTS: Temporomandibular joint involvement was clinically observed in 28 patients (65.1%), and radiologically in 33 patients (76.7%). The most frequent physical examination finding, a "click" in the joint upon opening of the mouth, was found in 21 (48.8%) patients. The most frequently observed radiological finding was synovial proliferation seen in 22 (51.1%) patients. A statistically significant correlation was observed between erythrocyte sedimentation rate and the findings on magnetic resonance imaging; between the rheumatoid factor results and physical examination findings; and between the findings of the physical examination and magnetic resonance imaging. CONCLUSION: The erythrocyte sedimentation rate, the rheumatoid factor results, and the findings on magnetic resonance imaging were found to be important in indicating temporomandibular joint involvement in rheumatoid arthritis. Further studies are necessary to specify the risk factors in more detail.


Subject(s)
Arthritis, Rheumatoid/complications , Temporomandibular Joint Disorders/diagnosis , Temporomandibular Joint Disorders/etiology , Adult , Aged , Arthritis, Rheumatoid/drug therapy , Blood Sedimentation , Female , Humans , Magnetic Resonance Imaging , Male , Middle Aged , Rheumatoid Factor/analysis
15.
Clin Exp Immunol ; 152(3): 472-81, 2008 Jun.
Article in English | MEDLINE | ID: mdl-18373702

ABSTRACT

Pemphigus vulgaris (PV) is an autoimmune blistering disease that affects the skin and multiple mucous membranes, and is caused by antibodies to desmoglein (Dsg) 1 and 3. Natural killer (NK) cells have a role in autoimmunity, but their role in PV is not known. NK cells in the peripheral blood leucocytes (PBL) of 15 untreated Caucasian patients with active PV were studied and compared with healthy controls for the expression of major histocompatibility complex (MHC) class II and co-stimulatory molecules. CD56+ CD16- CD3- NK or CD56+ CD16+ CD3- NK cells from the PBL of PV patients co-express MHC class II and co-stimulatory molecule B7-H3 without exogenous stimulation. CD4+ T cells from the PBL and perilesional skin of PV patients were co-cultured with CD56+ CD3- NK cells from the PBL of the same patients; in the presence of Dsg3 peptides underwent statistically significant proliferation, indicating that NK cells functioned as antigen-presenting cells. Supernatants from these co-cultures and serum of the same patients with active PV had statistically significantly elevated levels of interleukin (IL)-6, IL-8 and interferon-gamma, compared with controls indicating that the NK cells stimulated CD4+ T cells to produce proinflammatory cytokines. In these experiments, we present preliminary evidence that NK cells may play a role in the pathobiology of PV.


Subject(s)
Killer Cells, Natural/immunology , Pemphigus/immunology , Aged , Antigen Presentation/immunology , Antigens, CD/blood , B7 Antigens , CD4-Positive T-Lymphocytes/immunology , Cell Proliferation , Coculture Techniques , Cytokines/biosynthesis , Desmoglein 3/immunology , Female , Histocompatibility Antigens Class II/blood , Humans , Lymphocyte Activation/immunology , Male , Middle Aged , Receptors, Immunologic/blood , Skin/immunology
16.
J Int Med Res ; 31(4): 330-4, 2003.
Article in English | MEDLINE | ID: mdl-12964510

ABSTRACT

The pressure effects of Salter innominate osteotomy (SIO), a surgical treatment for developmental hip dysplasia (DHD), on the sacroiliac joint were investigated in a retrospective study. Pre- and post-operative direct anteroposterior pelvic radiographs of 60 cases with unilateral DHD treated by SIO were examined. The mean age at surgery was 27.7 months (range 18-48 months). The distance from the posterior inferior iliac spine to the midline (from the middle of the first sacral vertebra to the symphysis pubis) was measured. No difference was found between pre- and post-operative distances on the normal, non-operated side. On the operated side, no change was observed in 10 cases (16.7%), but the distance increased by 2 mm or 3 mm in 50 cases (83.3%) post-operatively. This increase was statistically significant, but not related to age at surgery. These findings indicate that SIO creates pressure on the inferior part of the sacroiliac joint, resulting in some displacement. Such irreversible changes may eventually lead to joint degeneration and pain.


Subject(s)
Hip Dislocation, Congenital/surgery , Osteotomy/methods , Pelvic Bones/anatomy & histology , Pelvic Bones/surgery , Sacroiliac Joint/anatomy & histology , Child, Preschool , Female , Hip Dislocation, Congenital/pathology , Humans , Infant , Male , Pelvic Bones/pathology , Retrospective Studies , Sacroiliac Joint/pathology
17.
J Biomater Sci Polym Ed ; 14(6): 497-514, 2003.
Article in English | MEDLINE | ID: mdl-12901434

ABSTRACT

Pain is the most common and feared symptom for patients, especially those with cancer. Treatment of chronic pain with conventional ways of medication usually fails with increasing severity of the pain. New approaches enabling the prolonged provision of pain relievers are required. We designed a controlled release system of pain relievers, mainly for opioids (morphine, M, codeine, C, and hydromorphone, HM), and a local anesthetic (bupivacaine, BP) in the form of poly(L-lactide-co-glycolide) (PLGA) rods. The efficacy of these rods implanted alone or in combination in relieving chronic pain in rats caused by the ligation of the sciatic nerve of their right hind limbs was studied. The two most common tests for measuring analgesia, i.e. tail-flick tests, that show analgesia at sites other than the site of injury, were used to study the degree of systemic distribution of the drugs and paw-withdrawal tests were used to study the analgesia at the site of injury. Alleviation of this chronic and severe neuropathic pain could be obtained for about 3-4 days when rods for two drugs, 'dual drug' (analgesic-anesthetic), were used. This duration is decreased by half (2 days) with the single-drug rods. Also the dual-drug rods, though at half the dose of each single drug application, enhanced the degree of analgesia of the first day. These in vivo results are also consistent with the previous in vitro results as in the case with codeine which had a higher first-day analgesia than morphine, despite a lower potency due to the faster in vitro release rate. Similarly, slower release of hydromorphone from PLGA (85:15) rods resulted in less systemic analgesia than the more rapidly eroding PLGA (50:50) rods of the same drug.


Subject(s)
Analgesics, Opioid/administration & dosage , Anesthetics, Local/administration & dosage , Drug Implants/administration & dosage , Pain/drug therapy , Animals , Behavior, Animal/drug effects , Biocompatible Materials , Biodegradation, Environmental , Bupivacaine/administration & dosage , Codeine/administration & dosage , Codeine/therapeutic use , Drug Delivery Systems/methods , Female , Hydromorphone/administration & dosage , Lactic Acid/chemistry , Lactic Acid/metabolism , Morphine/administration & dosage , Polyglycolic Acid/chemistry , Polyglycolic Acid/metabolism , Polylactic Acid-Polyglycolic Acid Copolymer , Polymers/chemistry , Polymers/metabolism , Rats , Rats, Sprague-Dawley , Time Factors
18.
J Int Med Res ; 30(4): 449-51, 2002.
Article in English | MEDLINE | ID: mdl-12235931

ABSTRACT

Primary muscle hydatidosis is very rare. Rupture and spreading of the cyst contents by improper handling may later cause secondary cyst or allergic reactions. Preoperative recognition of a hydatid cyst is therefore critical. It often presents as a soft-tissue mass, however, and pre-operative recognition of this rare entity is clearly difficult. Here, a case of primary hydatidosis affecting the gracilis muscle is presented, and the magnetic resonance imaging, clinical and pathological findings are described.


Subject(s)
Echinococcosis/diagnosis , Muscle, Skeletal/parasitology , Thigh , Adolescent , Echinococcosis/pathology , Female , Humans , Muscle, Skeletal/pathology
19.
Ulus Travma Derg ; 7(2): 122-5, 2001 Apr.
Article in Turkish | MEDLINE | ID: mdl-11705036

ABSTRACT

In this study, we tried to determine the frequency and violence of rotational deformities and evaluated their clinical results by the physical examination findings and the foot-progression angle in children's femoral shaft fractures to which it was applied the conservative treatment. In the Department of Orthopaedics and Traumatology of Atatürk University Medical School, between 1992-1999 years, of 82 children who were treated with traction and spica cast, 50 who could be controls and had unilateral fracture were included into this study. Of these cases, 11 (22%) were females and 39 (78%) males. The average age was 4.2 years, ranging from 4 days to 13 years. The traction period was 10-25 (average 18.1) days, and the cast period was from 20 days to 12 weeks (average 8.4 weeks). The cases were followed up with an average period of 3.5 years (5 months-6 years). The foot-progression angle increased in 21 cases (42%) as average 2.1 degrees and decreased in 26 cases (52%) as average 4.9 degrees. The change amount in angle was excessive in the elder children, the proximal femoral fractures and the cases whose the follow-up was smaller than 1 year (p < 0.01). However, in the final control, none of the cases and their parents had complaint, and physical and walking examinations were normal. In the result of this study, it was concluded that the rotational deformities that were symptomatic and required treatment were not the common complication after the conservative treatment in children's femoral shaft fractures.


Subject(s)
Casts, Surgical , Femoral Fractures/therapy , Fractures, Closed/therapy , Gait , Traction , Adolescent , Child , Child, Preschool , Female , Follow-Up Studies , Humans , Infant , Infant, Newborn , Male , Treatment Outcome , Turkey/epidemiology
20.
Ulus Travma Derg ; 7(1): 52-5, 2001 Jan.
Article in Turkish | MEDLINE | ID: mdl-11705175

ABSTRACT

There are the different opinions on the methods used in the treatment of acute grade III acromioclavicular dislocations and their results. In this study, the results of 10 patients treated with Neviaser's method and followed in The Department Orthopaedics and Traumatology of Atatürk University Medical School were evaluated. All patients were males and the average age was 36.5 (25 to 45) years. The causes of dislocations were falls on the shoulder in 5 cases (50%), traffic accidents in 4 cases (40%) and direct trauma to the shoulder in 1 case (10%). The mean interval between injury and operation time was 10.2 (5 to 20) days. The cases were followed up with an average period of 13.1 months (6 months 2 years). The excellent and good results were obtained in 9 cases (90%) and the complication was observed in not one of the patients. We consider that Neviaser's method is a good alternative in the treatment of acute grade III acromioclavicular dislocations that operation is indicated.


Subject(s)
Acromioclavicular Joint/injuries , Joint Dislocations/surgery , Accidental Falls , Accidents, Traffic , Acromioclavicular Joint/surgery , Acute Disease , Adult , Humans , Injury Severity Score , Joint Dislocations/etiology , Male , Middle Aged , Treatment Outcome
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