• Title/Summary/Keyword: prolonged culture

Search Result 164, Processing Time 0.02 seconds

On the effects of the characteristics of the titanium oxide to the osteoblast cell culture

  • Cho, Sung-Am
    • The Journal of Korean Academy of Prosthodontics
    • /
    • v.38 no.3
    • /
    • pp.358-359
    • /
    • 2000
  • Statement of problem. Confusion about the relationship of surface characteristics of implant to osteoblast cell attachment. Purpose. This study attempted to bone cell attachment to the implant surface which was modified by heat. Material and methods. Commercially pure titanium grade 2, $4{\times}4mm$ sheet 40 pieces were treated for 10 minutes with ultrasonic cleaner with methylethyl ketone, ethanol, deionized distilled water, and half of the specimen 20 pieces were heat treated in $980^{\circ}C$ for 15 minutes. All 40 specimens were autoclaves. Total 6 dishes were prepared, 3 dishes were for control group, and the other 3 dishes were for heat treatment. In fourth day, cell account was done. Conculsion. The change of surface characterization by heat treatment could affect the cell attachment in the early stage however, the change of surface characterization would not be prolonged.

  • PDF

Clinical Application of PCR-RFLP for the Differentiation of Trichophyton mentagrophytes var. erinacei in the Facial Dermatitis of Household African Pygmy Hedgehog (Erinaceus albiventris)

  • Han, Jae-Ik;Na, Ki-Jeong
    • Journal of Veterinary Clinics
    • /
    • v.25 no.3
    • /
    • pp.211-214
    • /
    • 2008
  • This report describes a case of severe and prolonged dermatophytosis in a hedgehog that was diagnosed by PCR-RFLP, a rapid and usefulness technique for identification of many causative agents and hereditary characters. A 5-month-old female hedgehog was presented with grade 2 facial pruritus, scaling, encrustation and hemorrhage. Cytology of exudates on the face showed a suspected fungal infection. A culture and tape imprint test of the cultured colony showed many hyphae and microcornidia, suspected to belong to the Trichophyton species. In the PCR-RFLP with MvaI and Hinf I, Trichophyton mentagrophytes var. erinacei was finally identified as a causative agent. The patient completely recovered after application of nystatin cream for 17 days.

Isolation and Evaluation of an Antitumor Constituent from Pyrolae Herba (녹수초의 항암활성물질의 분리 및 항암력 평가)

  • Bae, Ki-Hwan;Kim, Hwan-Mook;Lee, Sang-Myung
    • YAKHAK HOEJI
    • /
    • v.40 no.2
    • /
    • pp.225-229
    • /
    • 1996
  • The cytotoixic effect of Pylorae Herba (Pyrola japonica Klenze) against L1210 and K-562 cells was studied in vitro. The methanolic extract of Pylorae Radix was add ed to the culture of L1210 cells and K-562 cells for the cytotoxic activity and the ED50 values of hexane, ethylacetate, buthanol and water fractions from methanolic extract were determined using MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazoliumbromide) assay. The active constituent isolated by bioassay guided fractionation followed by purification gave rise to a yellow needle crystal and was clarified to be chimaphilline by the comparison with the published data. The average life spans with it were not prolonged significantly on tumor growth in hybrid female mouse (BDF1-KIST) inoculated subcutaneously with P388 cells.

  • PDF

Effects of Samkieum on LDL Oxidation in Macrophage Cell (지단백산화(脂蛋白酸化)에 따른 대식세포(大食細胞) 활성(活性)에 미치는 삼기음(三氣飮)의 영향(影響))

  • Lee, Hee-Jo;Hwang, Gwi-Seo;Kim, Kyung-Jun
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
    • /
    • v.19 no.2
    • /
    • pp.108-117
    • /
    • 2006
  • The oxidative notification of low density lipoprotein(LDL) has been implicated in the development of atherosclerosis. Oxidized LDL are found in macrophage foam cell, and it can induce an macrophage proliferation in atherosclerotic plaque. In this study, we investigated the hypothesis that Samkieum may reduce atherosclerosis by lowering the oxidiazability of LDL, To achieve this goal, we examined the effect of Samkieum on LDL oxidation nitric oxide production in mouse macrophage cell line, RAW264.7, and the effect of Samkieum on cupuric sulfate-induced cytotoxicity, LDH release, and macrophage activity. Samkieum inhibited the generation of oxidized LDL from native LDL in RAW264.7 cell culture, and decreased the release of LDH from cupric sulfate-stimulated RAW264.7 cell. In other experiments, Samkieum activated RAW264.7 cell, and prolonged the survival time, and increased nitric oxide production in Raw 264.7 cells.

  • PDF

Candida albicans urinary tract infection in a Shih Tzu dog with immune-mediated hemolytic anemia

  • Jang, In-Sung;Yoon, Won-Kyoung;Hyun, Changbaig
    • Korean Journal of Veterinary Research
    • /
    • v.57 no.2
    • /
    • pp.139-141
    • /
    • 2017
  • An 8-year-old castrated male Shih Tzu dog (weighing 7.0 kg) presented with anemia and lethargy. Initial diagnosis indicated immune-mediated hemolytic anemia. During therapy, a secondary urinary infection, probably due to the immune suppressive therapy, was diagnosed. Subsequent diagnostic tests, including urinalysis and urine culture, indicated candidal cystitis. Despite ketoconazole therapy for candidal cystitis, the dog died suddenly. A Candida albicans infection was confirmed upon postmortem evaluation. Prolonged immunosuppressive therapy might be the cause of this infection. This is the first case report describing a Candida albicans urinary tract infection accompanied by hemolytic anemia in a dog in Korea.

EFFECT OF PLANT PHENOLIC ACIDS ON CELLULOLYTIC ACTIVITY OF MIXED RUMEN POPULATIONS

  • Ushida, K.;Watase, H.;Kojima, Y.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.3 no.1
    • /
    • pp.27-31
    • /
    • 1990
  • Influences of plant phenolic acids and their possible metabolites(non-phenolic aromatic acids involved) in the rumen on the cellulolytic activity of mixed rumen populations were examined by a simple in vitro culture technique. Initial concentrations of aromatic acids were 1, 5, 10 and 20 mM/l. All the tested aromatic acids reduced microbial cellulose digestion especially at the higher initial concentration. P-Coumaric acid, ferulic acid and cinnamic acid, those having unhydrogenated propenoic side chain were more inhibitory than were 3-phenylpropinic acid and phloretic acid, those having hydrogenated propanoic side chain. Lag-time for cellulose digestion was prolonged by former three acids by 16 h. Apparent reduction in p-coumaric acid concentration was observed at 24 h when cellulose digestion began. Volatile fatty acid productions from cellulose fermentation were shifted by former three aromatic acids to produce more acetate and less propionate. This suggests that the selection of celluloytic organisms was induced by these aromatic acids.

Mass Sporulating Method for Conidial Formation of Mycosphaerella nawae Causing the Spotted Leaf Casting of Persimmon (감나무 둥근무늬낙엽병균(Mycosphaerella nawae)의 분생포자 대량 형성법)

  • Kwon, Jin-Hyeuk;Kang, Soo-Woong;Kim, Dong-Kil;Park, Chang-Senk;Kim, Hee-Kyu
    • Korean Journal Plant Pathology
    • /
    • v.13 no.4
    • /
    • pp.255-256
    • /
    • 1997
  • The mass sporulating method for conidia of Mycosphaerella nawac the causal organism of the spotted leaf casting of persimmon was investigated in this experiment. The conidia of M. nawae were sporulated on artificial media after prolonged period of incubation. The maximum amount of conidia of $39.0{\times}10^4/ml$ was harvested from 90-day old culture on PDA at $25^{\circ}C.$

  • PDF

Effects of Gamisoyosan(GS) on LDL Oxidation in RAW 264.7 Cell. (가미소요산(加味逍遙散)이 지단백산화(脂蛋白酸化)에 따른 RAW 264.7 활성(活性)에 미치는 영향(影響))

  • Hwang Gwi-Seo
    • Journal of Society of Preventive Korean Medicine
    • /
    • v.5 no.1
    • /
    • pp.134-143
    • /
    • 2001
  • The oxidative modification of low density lipoprotein(LDL) has been implicated in the development of atherosclerosis. Oxidized LDL are found in macrophage foam cell, and it can induce an macrophage proliferation in atherosclerotic plaque. In this study, we investigated the hypothesis that gamisoyosan(GS) may reduce atherosclerosis by lowering the oxidiazability of LDL, To achive this goal, we examined the effect of GS on LDL oxidation, nitric oxide production in mouse macrophage cell line, RAW264.7, and the effect of GS on cupuric sulfate-induced cytotoxicity, LDH release, and macrophage activity. GS inhibited the generation of oxidized LDL from native LDL in RAW264.7 cell culture, and decreased the release of LDH from cupric sulfate-stimulated RAW264.7 cell. In other experiments, GS activated RAW264.7 cell, and prolonged the survival time, and increased nitric oxide production in Raw 264.7 cells.

  • PDF

Flavonoids baicalein and kaempferol reduced inflammation in benign prostate hyperplasia patient-derived cells through regulating mitochondrial respiration and intracellular oxygen species

  • Lee, Dongu;Lee, Jong Hun;Lee, Seung Hwan
    • Korean Journal of Food Science and Technology
    • /
    • v.53 no.2
    • /
    • pp.213-217
    • /
    • 2021
  • Benign prostate hyperplasia (BPH) is one of the most common elderly disease, and because of prolonged incubation period and many side effects of medication or surgical interventions, the use of dietary phytochemicals is considered as an effective measure for prevention of BPH. The purpose of this study is to investigate the mechanism of inhibition effect for BPH by flavonoids such as baicalein and kaempferol. BPH cells were collected through biopsy from patients with PSA of 4 or higher, followed by primary culture. In vitro experiments were conducted to evaluate mitochondrial respiration, intracellular reactive oxygen species (ROS) level and expression of inflammatory markers, genes, and anti-oxidants. In conclusion, baicalein and kaempferol have been demonstrated to inhibit BPH through lowering ROS, thereby reducing inflammation triggers, and reduced inflammation. This study is expected to be helpful in the development of flavonoids that have a clinical effect on suppressing BPH.

Clinical Characteristics of Peroneal Nerve Palsy by Posture

  • Yu, Jeong Keun;Yang, Jin Seo;Kang, Suk-Hyung;Cho, Yong-Jun
    • Journal of Korean Neurosurgical Society
    • /
    • v.53 no.5
    • /
    • pp.269-273
    • /
    • 2013
  • Objective : Posture induced common peroneal nerve (CPN) palsy is usually produced during the prolonged squatting or habitual leg crossing while seated, especially in Asian culture and is manifested by the onset of foot drop. Because of its similarity to discogenic foot drop, patients may be diagnosed with a lumbar disc disorder, and in some patients, surgeons may perform unnecessary examinations and even spine surgery. The purpose of our study is to establish the clinical characteristics and diagnostic assessment of posture induced CPN palsy. Methods : From June 2008 to June 2012, a retrospective study was performed on 26 patients diagnosed with peroneal nerve palsy in neurophysiologic study among patients experiencing foot drop after maintaining a certain posture for a long time. Results : The inducing postures were squatting (14 patients), sitting cross-legged (6 patients), lying down (4 patients), walking and driving. The mean prolonged neural injury time was 124.2 minutes. The most common clinical presentation was foot drop and the most affected sensory area was dorsum of the foot with tingling sensation (14 patients), numbness (8 patients), and burning sensation (4 patients). The clinical improvement began after a mean 6 weeks, which is not related to neural injury times. Electrophysiology evaluation was performed after 2 weeks later and showed delayed CPN nerve conduction study (NCS) in 24 patients and deep peroneal nerve in 2 patients. Conclusion : We suggest that an awareness of these clinical characteristics and diagnostic assessment methods may help clinicians make a diagnosis of posture induced CPN palsy and preclude unnecessary studies or inappropriate treatment in foot drop patients.