1.A case of Kikuchi's disease(subacute necrotizing lymphocytes).
Jakyoung SHIN ; Yun Jeong LEE ; Hye Kyoung AHN ; Chun Wook PARK ; Cheol Heon LEE
Korean Journal of Dermatology 1992;30(5):665-668
Kikuchi's disease is a self-limiting lymphadenitis, predomin;intly of young women who present with cervical lymphadenopathy. We present a case of Kikuchis disease in a 18-year-old female, representing multiple tender subcutaneous mass on her neck, left eyelid and posteriarcuricle. Histopathologically, the biopsied mass was a lymph node showing architectural effacement by necrotic focicomposed of nucear karyorrhexis and mononucl ar cell proliferation.
Adolescent
;
Cell Proliferation
;
Eyelids
;
Female
;
Histiocytic Necrotizing Lymphadenitis
;
Humans
;
Lymph Nodes
;
Lymphadenitis
;
Lymphatic Diseases
;
Neck
2.Dual Inhibition of PI3K/Akt/mTOR Pathway and Role of Autophagy in Non-Small Cell Lung Cancer Cells.
Eun Hui JEONG ; Hyeong Sim CHOI ; Tae Gul LEE ; Hye Ryoun KIM ; Cheol Hyeon KIM
Tuberculosis and Respiratory Diseases 2012;72(4):343-351
BACKGROUND: The phosphoinositide 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) signaling axis has emerged as a novel target for cancer therapy. Agents that inhibit this pathway are currently under development for lung cancer treatment. In the present study, we have tested whether dual inhibition of PI3K/Akt/mTOR signaling can lead to enahnced antitumor effects. We have also examined the role of autophagy during this process. METHODS: We analyzed the combination effect of the mTOR inhibitor, temsirolimus, and the Akt inhibitor, GSK690693, on the survival of NCI-H460 and A549 non-small cell lung cancer cells. Cell proliferation was determined by MTT assay and apoptosis induction was evaluated by flow cytometry and terminal deoxynucleotidyl transferase dUTP nick end labeling assay. Autophagy induction was also evaluated by acridine orange staining. Changes of apoptosis or autophagy-related proteins were evaluated by western blot analysis. RESULTS: Combination treatment with temsirolimus and GSK690693 caused synergistically increased cell death in NCI-H460 and A549 cells. This was attributable to increased induction of apoptosis. Caspase 3 activation and poly(ADP-ribose) polymerase cleavage accompanied these findings. Autophagy also increased and inhibition of autophagy resulted in increased cell death, suggesting its cytoprotective role during this process. CONCLUSION: Taken together, our results suggest that the combination of temsirolimus and GSK690693 could be a novel strategy for lung cancer therapy. Inhibition of autophagy could also be a promising method of enhancing the combination effect of these drugs.
Acridine Orange
;
Apoptosis
;
Autophagy
;
Axis, Cervical Vertebra
;
Blotting, Western
;
Carcinoma, Non-Small-Cell Lung
;
Caspase 3
;
Cell Death
;
Cell Proliferation
;
DNA Nucleotidylexotransferase
;
Flow Cytometry
;
Lung Neoplasms
;
Oxadiazoles
;
Phosphatidylinositol 3-Kinases
;
Poly(ADP-ribose) Polymerases
;
Proteins
;
Sirolimus
;
TOR Serine-Threonine Kinases
3.A Histopathological Study on the Estrogen-induced Breast Lesion in Rats.
Gyung Hyuck KO ; Cheol Keun PARK ; Myoung Keun SHIN ; Soo Min KANG ; Hye Jung LEE ; Jeong Hee LEE
Korean Journal of Pathology 1992;26(5):466-475
Forty eight female Sprague-Dawley rats received a subcutaneous implant containing 12.5 mg estradiol ant the age of 3 weeks. Three rats were killed in 1, 2, 3, 4, 6 weeks and in every month during 2~12 months after implantation, and the breasts were examined by light microscope. In all rats, enlargement of terminal end buds was obseved in 1~2 weeks, maximum development of hyperplastic alveolar nodules in 3 weeks, and marked dilatation and secretion of alveoli or ducts in 1~12 months after implantation. Ductal epithelial hyperplasia was observed in 27 rats and carcinomas developed in 23 rats in 2~12 months after implantation. It was thought that the changes induced by estradiol are more similar to the human breast lesions, compared with changes induced by chemical carcinogens such as dimethylbenzanthracene(DMBA), because breast carcinomas developed in close relationship with ductal epithelial hyperplasia in both estradiol-treated rats and humans, but not in DMBA-treated rats.
Female
;
Humans
;
Rats
;
Animals
;
Carcinogens
4.A case report of pigmented dermatofibrosarcoma protuberans (Bednar tumor).
Jeong Sam LEE ; Keon Jung KIM ; Jong Cheol JEONG ; Heung Ki MIN ; Jae Sun CHOI ; Heum Rye PARK ; Sung Hye PARK ; Seung Yon HA
Journal of the Korean Association of Oral and Maxillofacial Surgeons 1997;23(1):145-151
Bednar tumor was described by Bednar in 1957. The histologic pattern of this tumor shows similar to dermatofibrosarcoma protuberans (DFSP) but melanin pigments are scattered within the tumor, It's rare neoplasm accounting for approximately 1-5% of all case of DFSP. Clinically, this tumor is considered to be intermediated malignancy, because of slow growth and frequent local recurrence and lack of distant metastasis. The majority are located on the trunk and the upper and lower extremities, but extremely rate in the head and neck area. Microscopically, this tumor is characterized by tight storiform spindle cells and long slender cells that admixed with a small population of melanin containing dendritic cells. This dendritic cells are the primary features distinguising this lesion from conventional DFSP. Complete surgical excision and close follow-up case are necessany for this neoplasm because of probable intermediate malignancy. A patient was admitted to Our Department of Oral and Maxillofacial Surgery due to swelling on right parotid area and numbness of the right lower lip on September, 1994, By clinical examinations and C-T finding, we dignosed tentatively as myxoma or pleomorphic adenoma. Surgical excision of this tumor was performed with parotidectomy and mandibular osteotomy under the frozen biopsy. By final microscopic and electromicroscopic examination and immunohistochemical study, this tumor was diagnosed as Bednar tumor. So, we report a case of pigmented DFSP with review of literatures.
Adenoma, Pleomorphic
;
Biopsy
;
Dendritic Cells
;
Dermatofibrosarcoma*
;
Follow-Up Studies
;
Head
;
Humans
;
Hypesthesia
;
Lip
;
Lower Extremity
;
Mandibular Osteotomy
;
Melanins
;
Myxoma
;
Neck
;
Neoplasm Metastasis
;
Recurrence
;
Surgery, Oral
5.The effect of Er,Cr:YSGG irradiation on microtensile bond strength of composite resin restoration.
Jeong Hye SON ; Hyeon Cheol KIM ; Bock HUR ; Jeong Kil PARK
Journal of Korean Academy of Conservative Dentistry 2010;35(2):134-142
The purpose of this study was to evaluate the effect of Er,Cr:YSGG laser irradiation with hypersensitivity mode on microtensile bond strength of composite resin. Twenty extracted permanent molars were randomly assigned to six groups, according to the irradiation of Er,Cr:YSGG laser, adhesive system (Optibond FL or Clearfil SE bond) and application time of etchant (15 sec or 20 sec). Then composite resin was build up on each conditioned surface. The restored teeth were stored in distilled water at room temperature for 24 h and twelve specimens for each group were prepared. All specimens were subjected to microtensile bond strength and the fracture modes were evaluated. Also, the prepared dentin surface and laser irradiated dentin surface were examined under SEM. The results were as follows: 1. The microtensile bond strength of laser irradiated group was lower than that of no laser irradiated group. 2. Regardless of laser irradiation, the microtensile bond strength of Optibond FL was higher than that of Clearfil SE bond. And the microtensile bond strength of 20 sec etching group was higher than that of 15 sec etching group when using Optibond FL. 3. The SEM image of laser irradiated dentin surface showed prominent peritubular dentin, opened dentinal tubules and no smear layer.
Adhesives
;
Dentin
;
Hypersensitivity
;
Molar
;
Resin Cements
;
Smear Layer
;
Tooth
;
Water
6.Management of white spots: resin infiltration technique and microabrasion.
Jeong Hye SON ; Bock HUR ; Hyeon Cheol KIM ; Jeong Kil PARK
Journal of Korean Academy of Conservative Dentistry 2011;36(1):66-71
This case report compared the effectiveness of resin infiltration technique (Icon, DMG) with microabrasion (Opalustre, Ultradent Products, Inc.) in management of white spot lesions. It demonstrates that although neither microabrasion nor resin infiltration technique can remove white spot lesions completely, resin infiltration technique seems to be more effective than microabrasion. Therefore resin infiltration technique can be chosen preferentially for management of white spot lesions and caution should be taken for case selection.
Dental Caries
;
European Continental Ancestry Group
;
Humans
7.Time Point Expression of Apoptosis Regulatory Proteins in a Photochemically-Induced Focal Cerebral Ischemic Rat Brain
Hyung Seok KIM ; Man Seok PARK ; Jeong Kil LEE ; Hye Jeong KIM ; Jong Tae PARK ; Min Cheol LEE
Chonnam Medical Journal 2011;47(3):144-149
Apoptosis after global or focal cerebral ischemia plays a crucial role in mediating cell death. In this study, we observed the time point expression of physiologic events involving apoptosis regulatory proteins after photochemically-induced focal cerebral ischemia in Sprague-Dawley rats. Protein expression was evaluated at days 1, 3, and 7 by Western blot. Bcl-2, Bax, caspase-3, and phosphorylated Akt (pAkt) activity markedly increased in the ischemic hemisphere in a time-dependent manner, not affected. The expression of Bcl-2, Bax, and caspase-3 was dramatically changed around day 3, whereas changes in pAkt expression occurred at day 1. Differential elevation of these apoptosis regulatory proteins at various time points indicates that different modes of cell death occur in photochemically-induced focal cerebral ischemia in a rat brain.
Animals
;
Apoptosis
;
Apoptosis Regulatory Proteins
;
Blotting, Western
;
Brain
;
Brain Ischemia
;
Caspase 3
;
Cell Death
;
Negotiating
;
Rats
;
Rats, Sprague-Dawley
;
Rose Bengal
8.Amelioration of DSS-Induced Acute Colitis in Mice by Recombinant Monomeric Human Interleukin-22
Suhyun KIM ; Eun-Hye HONG ; Cheol-Ki LEE ; Yiseul RYU ; Hyunjin JEONG ; Seungnyeong HEO ; Joong-Jae LEE ; Hyun-Jeong KO
Immune Network 2022;22(3):e26-
IL-22, a pleiotropic cytokine, is known to have a profound effect on the regeneration of damaged intestinal barriers. The tissue-protective properties of IL-22 are expected to be potentially exploited in the attenuation and treatment of colitis. However, because of the disease-promoting role of IL-22 in chronic inflammation, a comprehensive evaluation is required to translate IL-22 into the clinical domain. Here, we present the effective production of soluble human IL-22 in bacteria to prove whether recombinant IL-22 has the ability to ameliorate colitis and inflammation. IL-22 was expressed in the form of a biologically active monomer and non-functional oligomers. Monomeric IL-22 (mIL-22) was highly purified through a series of 3 separate chromatographic methods and an enzymatic reaction. We reveal that the resulting mIL-22 is correctly folded and is able to phosphorylate STAT3 in HT-29 cells. Subsequently, we demonstrate that mIL-22 enables the attenuation of dextran sodium sulfate-induced acute colitis in mice, as well as the suppression of pro-inflammatory cytokine production. Collectively, our results suggest that the recombinant mIL-22 is suitable to study the biological roles of endogenous IL-22 in immune responses and can be developed as a biological agent associated with inflammatory disorders.
9.Effects of Immunostimulatory CpG-Oligodeoxynucleotides of Bronchial Asthma in Rat.
Sin Hyung LEE ; Je Hyeong KIM ; Hye cheol JEONG ; Kyung Kyu KIM ; Ki Hwan JUNG ; Byung Gyu KIM ; Seung Heon LEE ; Sang Myun PARK ; Cheol SIN ; Jae Youn CHO ; Jae Jeong SHIM ; Kwang Ho IN ; Se Hwa YOO ; Kyung Ho KANG
Tuberculosis and Respiratory Diseases 2001;50(1):12-28
BACKGROUND AND OBJECT: Immunostimulatory CpG-oligodeoxynucleotides (ISS CpG-ODN) up-regulate the TH1-type immune response and down-regulate the TH2-type response. This study was performed to investigate the immune response changes resulting from ISS CpG-ODN on bronchial hyperrestponsiveness, eosinophilic inflammation and mucus hypersecretion in rat asthma. MATERIALS AND METHODS: 10 normal controls(NC) and 26 asthmatic rats, which were generated by ovallbumin(OVA) sensitization and challenge, were studied. The asthmatic rats were randomized into 11 asthma controls(AC) and 15 in the asthma-CpG treatment group(CpG). The CpG group was administered ISS CpG-ODN intramuscularly and the AC group was administered a placebo(0.9% NaCl)on day 15 and 20. After CpG-ODN or placebo administration, we measured the IFN-(TH1-type cytokine) and IL-4(TH2-type cytokine) levels in the bronchoalveolar lavage fluid(BALF), the specific airway resistance(sRaw), eosinophilic fraction in BALF, eosinophilic infiltration, goblet cell dysplasia and MUC5AC gene expression in the lung tissue. RESULTS: In the BALF of the CpG group, the IFN-γ concentration was significantly high and the IL-4 concentration was significantly low when compared with the AC group. Both the sRaw and eosinophilic fraction, and infiltration into the BALF and lung tissue significantly lower in the CpG group when compared with the AC group. However, little difference in goblet cell dysplasia and MUC5Ac gene expression was observed between the CpG group and the Ac group. CONCLUSION: ISS CpG-ODN decreases bronchial hyperresponsiveness and eosinophilic inflammation in the rat asthma model through the up-regulation of the TH1-type immune response with the down-regulation of the TH2-type response. However, the effect of these immune response changes on mucus hypersecretion was is not remarkable in this study.
Animals
;
Asthma*
;
Bronchoalveolar Lavage
;
Down-Regulation
;
Eosinophils
;
Gene Expression
;
Goblet Cells
;
Inflammation
;
Interleukin-4
;
Lung
;
Mucus
;
Rats*
;
Up-Regulation
10.A Case of Recurrent Peripartum Cardiomyopathy.
Hyoun Cheol ZOOH ; Jeong Seo KOO ; Do Keun LEE ; Ji Hye JEON ; Jae Min LEE ; Joo Hong LEE
Korean Journal of Perinatology 2003;14(4):442-446
Peripartum cardiomyopahty(PPCM) is an uncommon myocardial disease arising in the last month of pregnancy or within 5 months after delivery, in the absence of obvious cause and without prior evidence of heart disease. The risk of recurrence of PPCM is considered low when left ventricular size and function return to normal. But we experienced a case of peripartum cardiomyopathy recurred in subsequent pregnancy despite the return to normal heart size and function. This case was summarized here with a brief review of the related literatures.
Cardiomyopathies*
;
Heart
;
Heart Diseases
;
Peripartum Period*
;
Pregnancy
;
Recurrence