• 제목/요약/키워드: oral epithelial cell

검색결과 194건 처리시간 0.021초

Effects of Orally-Administered Bifidobacterium animalis subsp. lactis Strain BB12 on Dextran Sodium Sulfate-Induced Colitis in Mice

  • Chae, Jung Min;Heo, Wan;Cho, Hyung Taek;Lee, Dong Hun;Kim, Jun Ho;Rhee, Min Suk;Park, Tae-Sik;Kim, Yong Ki;Lee, Jin Hyup;Kim, Young Jun
    • Journal of Microbiology and Biotechnology
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    • 제28권11호
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    • pp.1800-1805
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    • 2018
  • Inflammatory bowel disease, including Crohn's disease and ulcerative colitis (UC), is a chronically relapsing inflammatory disorder of the gastrointestinal tract. Intestinal epithelial cells (IECs) constitute barrier surfaces and play a critical role in maintaining gut health. Dysregulated immune responses and destruction of IECs disrupt intestinal balance. Dextran sodium sulfate (DSS) is the most widely used chemical for inducing colitis in animals, and its treatment induces colonic inflammation, acute diarrhea, and shortening of the intestine, with clinical and histological similarity to human UC. Current treatments for this inflammatory disorder have poor tolerability and insufficient therapeutic efficacy, and thus, alternative therapeutic approaches are required. Recently, dietary supplements with probiotics have emerged as promising interventions by alleviating disturbances in the indigenous microflora in UC. Thus, we hypothesized that the probiotic Bifidobacterium animalis subsp. lactis strain BB12 could protect against the development of colitis in a DSS-induced mouse model of UC. In the present study, oral administration of BB12 markedly ameliorated DSS-induced colitis, accompanied by reduced tumor necrosis factor-${\alpha}$-mediated IEC apoptosis. These findings indicate that the probiotic strain BB12 can alleviate DSS-induced colitis and suggest a novel mechanism of communication between probiotic microorganisms and intestinal epithelia, which increases intestinal cell survival by modulating pro-apoptotic cytokine expression.

Evaluation of Renal Toxicity by Combination Exposure to Melamine and Cyanuric Acid in Male Sprague-Dawley Rats

  • Son, Ji Yeon;Kang, Yoon Jong;Kim, Kyeong Seok;Kim, Tae Hyung;Lim, Sung Kwang;Lim, Hyun Jung;Jeong, Tae Cheon;Choi, Dal Woong;Chung, Kyu Hyuck;Lee, Byung Mu;Kim, Hyung Sik
    • Toxicological Research
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    • 제30권2호
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    • pp.99-107
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    • 2014
  • Melamine-induced nephrotoxicity is closely associated with crystal formation in the kidney caused by combined exposure to melamine (Mel) and cyanuric acid (CA). However, there are few dosage-finding studies for toxicological evaluation of chronic co-exposure to Mel and CA. The objective of this study was to investigate the possible mechanism by which a Mel and CA mixture lead to renal toxicity in rats. Mel and CA were co-administered to rats via oral gavage for 50 days. Nephrotoxicity was determined by measuring blood urea nitrogen (BUN) and serum creatinine (sCr) levels. Relative kidney weights were significantly increased in rats after co-exposure to Mel+CA (63/6.3 or 630/6.3 mg/kg) mixtures. BUN and sCr levels were significantly increased after Mel and CA co-exposure. Taken together, significant increase in KIM-1, NGAL, and calbindin levels were observed in the urine of rats exposed to Mel+CA (63/6.3 or 630/6.3 mg/kg) compared with the corresponding control group. Histological analysis revealed epithelial degeneration and necrotic cell death in the proximal tubules of the kidney after co-exposure to Mel+CA (63/6.3 or 630/6.3 mg/kg). Our data suggest that Mel-mediated renal toxicity may be influenced by CA concentrations in Mel-contaminated milk or foods.

Fertility-Preserving Treatments in Patients with Gynecological Cancers: Chinese Experience and Literature Review

  • Liu, Chun-Yan;Li, Hua-Jun;Lin, Hua;Ling, Bin
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권12호
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    • pp.4839-4841
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    • 2015
  • We conducted a retrospectively reviewed of the literature published of patients underwent fertility-preserving treatments for cervical, endometrial and ovarian cancers using the WANFANG database in Chinese. A majority were retrospective studies and case reports. With cervical cancer, radical trachelectomy(RT) in combination with pelvic lymphadenectomy could preserve the fertility of patients with early stage IA1-IB1 cancers, Tumor size ${\leq}2cm$ should be emphasized as the indication of RT in considering of the higher recurrent rate in patients with tumor size >2cm. For endometrial cancers, there is much experience on it. Given accurate pretreatment assessment, hormonal therapy is feasible management option to preserve fertility in young patients with early stage lesions that limited to the endometrium and well differentiated. High dose progestin have been applied, oral medroxyprogesterone acetate (MPA), 250-500mg/day, megestrol acetate 160-480mg/day. Other therapies that have been used in a limited number of cases include GnRH analog, intrauterine devices (IUDS) containing progestogen, usually combination of these therapies. All patients should be followed up by ultrasound and/or MRI evaluation, and endometrial curettage at intervals of 3 months. With ovarian cancer, in China, fertilitypreserving surgery in patients with stage IA (grade G1) of epithelial ovarian tumor and patients with germ cell tumor and borderline ovarian tumor have been successfully performed.

5-Aminolevulinic Acid Fluorescence in Detection of Peritoneal Metastases

  • Yonemura, Yutaka;Canbay, Emel;Ishibashi, Haruaki;Nishino, Eisei;Endou, Yoshio;Sako, Shouzou;Ogura, Shun-Ichirou
    • Asian Pacific Journal of Cancer Prevention
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    • 제17권4호
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    • pp.2271-2275
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    • 2016
  • Background: The value of 5-aminolevulinic acid (ALA) in fluorescence detection of peritoneal metastases and the underlying mechanisms were evaluated in patients with peritoneal surface malignancies. Materials and Methods: Oral 5-ALA was administered at a concentration of 20 mg/kg body weight with 50 ml of water 2 hours prior to surgery (n=115). The diagnostic value of 5-ALA based fluorescence production was evaluated following white light inspection during prior to cytoreductive surgery and hyperthermic intraperitoneal chemotherapy. Then, peptide transporter PEPT1 (ALA influx transporter) and ATP-binding cassette transporter ABCG2 (porphyrin efflux transporter) gene expression was determined with quantitative real time (qRT)-PCR and pathological diagnoses confirmed for all tissue samples. Results: The 5-ALA based photodynamic detection rate was 17% for appendiceal mucinous neoplasms, 54% for colorectal cancers, 33% for gastric cancers, 67% for diffuse malign peritoneal mesotheliomas, and 89% for epithelial ovarian cancer of peritoneal metastases. 5-ALA was detected in all cases of peritoneal metastases originating from cholangiocarcinomas whereas it was not able to detect any in granulosa cell and gastrointestinal stromal tumor cases. Furthermore, PEPT1 was overexpressed whereas ABCG2 expression was downregulated in tumors detected with fluorescence. Conclusions: 5-ALA provided 100% specificity and high sensitivity to detect peritoneal metastases in subgroups of patients with peritoneal surface mailgnancies. ALA influx transporter PEPT1 and porphyrin efflux transporter ABCG2 genes are important in tumor specific 5-ALA induced fluorescence in vivo. Further studies should clarify diagnostic utility of 5-ALA in peritoneal surface malignancies.

진행된 신세포암 환아에게 sorafenib 투여시 발생한 Hand-Foot syndrome 1예 (Hand-Foot syndrome induced by sorafenib, a multitargeted tyrosine kinase inhibitor, in a patient with advanced renal cell carcinoma)

  • 이승현;노성훈;김선영;장규윤;황평한
    • Clinical and Experimental Pediatrics
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    • 제52권1호
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    • pp.119-123
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    • 2009
  • 신세포암은 소아에서는 드물지만 모든 연령에 걸쳐 신 세뇨관의 상피세포에서 기인하는 침습적 악성 종양이다. 종양이 국소화 되어있다면 주위 림프절 절개와 함께 국소적 신절제술로 완벽히 제거될 수 있으나, 주위 림프조직을 침범한 경우나 전이 병변이 동반된 진행된 신세포암 에서는 보조 화학치료, 방사선치료 및 면역치료 등을 이용한다. Sorafenib는 경구, 다(多) kinase (multikinase) 억제제로서 최근 전이성 신장 암에 사용이 입증되었다. 그러나 설사, 피로, 탈모와 고혈압 등의 부작용과 발진이나 낙설 그리고 수족 피부 반응(hand-foot skin reaction)과 같은 피부변화 등이 보고되었다. 특히, 손바닥과 발바닥의 홍반 피부 병변을 보이는 수족 증후군(hand-foot syndrome, HFS)은 대부분 세포증식 억제 화학치료 약에 의해 야기된다. 손바닥 발바닥의 홍반성감각부전으로 알려진 수족 증후군은 저림과 고온의 물체에 대한 과민성 같은 감각이상의 전구증상 등을 특징으로 하며, 약 3- 4일 후 원위 지관절에 홍반과 동통을 수반한 양측에 대칭적 손바닥과 발바닥의 부종이 생긴다. 저자들은 14세 여아의 전이성 신세포암 치료에 sorafenib 사용 시 나타난 수족 증후군과 그에 대한 치료를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

함치성 낭종 및 법랑아세포종에 있어서 Apoptosis 관련 단백 발현에 관한 면역조직화학적 연구 (IMMUNOHISTOCHEMICAL STUDY ON EXPRESSION OF APOPTOSIS RELATED PROTEINS IN DENTIGEROUS CYST AND AMELOBLASTOMA)

  • 최진영
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제22권1호
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    • pp.15-21
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    • 2000
  • 저자는 국소적 재발율에 있어서 큰 차이를 보이는 두 치성종양중 대표적인 함치성 낭종과 법랑아세포종에 있어서 apoptosis 관련 단백(p53, bcl-2, bax)의 발현 양상을 관찰하기 위하여 10례의 함치성 낭종과 16례의 법랑아세포종에 대하여 면역조직화학적 연구를 실시하여 다음과 같은 결론을 얻었다. 1. p53은 함치성 낭종보다 법랑아세포종에서 강하게 발현되었고 법랑아세포종의 조직학적 분류에 따른 p53 발현의 차이를 관찰할 수 없었으며 함치성 낭종의 경우에는 p53이 거의 basal layer에서 발현되었다. 2. Bcl-2는 함치성 낭종의 경우 주로 기저층 혹은 전층에서 발현되었고 법랑아세포종에서는 바깥층 혹은 전층에서 발현되었는데 특히 종양 실질조직중 입방형 또는 주상형 세포층에 집중되어 염색되었다. 3. Bax는 함치성 낭종의 경우 법랑아세포종에 비하여 보다 강하게 발현되었고 함치성 낭종과 법랑아세포종간에 발현양상의 차이는 관찰할 수 없었다. 함치성 낭종 및 법랑아세포종에 있어서 apoptosis 관련단백의 발현양상에 관한 이러한 차이가 법랑아세포종의 독특한 공격적 성장양상과 연관이 있으리라 사료된다.

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치아종과 동반한 석회화 치성낭 (CALCIFYING ODONTOGENIC CYST ASSOCIATED WITH COMPLEX ODONTOMA)

  • 윤정훈;김수관;이창섭;이상호
    • 대한소아치과학회지
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    • 제29권3호
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    • pp.371-375
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    • 2002
  • 석회화 치성낭은 하나의 독립된 유형의 치성 병소로 인정하고 있지만, 조직학적 소견이 다양하고 분류 체계도 학자들마다 다르다. 또한 석회화 치성낭의 피복상피는 인접한 결합조직에 치성조직을 유도할 수 있는 능력을 갖고 있어 다른 치성 종양과 흔히 동반하여 발생한다. 이 증례는 5세 여아의 상악 전치부에 발생한 치아종을 동반한 석회화 치성낭으로, 매복된 상악 좌측 중절치 및 측절치 치관 주위로 경계가 잘 된 방사선 투과성 병소와 다발성의 방사성 불투과성 석회화 물질이 혼재된 병소였다. 병리조직학적으로 피복상피는 법랑모세포와 유사하였고 상피 내에 유령세포의 군집이 관찰되었다. 석회화된 종괴는 일부 잔존한 범랑기질이 상아질로 둘러싸여 있었고, 퇴축 법랑상피 및 유령세포의 군집이 관찰되어 복잡 치아종이 동반된 석회화 치성낭으로 진단하였다. 이 증례에서와 같이 소아에서도 매복치와 동반하여 방사선 투과 및 불투과상의 혼합 병소가 관찰되면 석회화 치성낭의 가능성을 항상 염두에 두어야 할 필요가 있다. 환자는 수술 1년이 경과한 현재까지 재발의 소견은 없었고, 현재 혼합치열기의 간격조절을 시행 받고 있는 중이다.

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염증성 치은 상피와 치낭의 표피성장인자 수용체의 발현 및 실험적 치아이동에 미치는 영향에 관한 연구 (Expression of Epidermal Growth Factor Receptor in the Inflamed Gingival Epithelium and the Dental Follicle)

  • 김영호;배창
    • 대한치과교정학회지
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    • 제27권2호
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    • pp.349-357
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    • 1997
  • 동소 mRNA 보합결합법과 면역조직 화학적 염색법을 이용하여 정상 치은 상피와 염증성 치은 상피의 표피성장인자 수용체의 발현을 관찰하여 치은 상피의 염증에 있어서 표피성장인자 수용체의 역할을 연구하고, 타액에 노출되지 않는 치낭 조직에 있어서 표피성장인자 수용체의 발현을 관찰하여 다음과 같은 결과를 얻었다. 1. 동소 mRNA 보합결합법상 정상 치은 상피에서 EGFR mRNA는 거의 기저세포층에 국한되어 나타났으며, 극세포층은 약양성을 보였고 과립층과 각화층에서는 발현되지 않았다. 2. 면역조직 화학적 염색법상 정상 치은 상피에서 EGFR 단백은 거의 각화층과 과립층에 국한되어 나타났으며, 극세포층은 약양성을 보였고 기저세포층에서는 발현되지 않았다. 3. 동소 mRNA 보합결합법상 염증성 치은 상피에서 EGFR mRNA는 각화층을 제외한 전층에 걸쳐서 균일하게 분포하였다. 4. 면역조직 화학적 염색법상 염증성 치은 상피에서 EGFR 단백은 기저세포층에서 각화층에 걸쳐서 균일하게 분포하였다. 5. 치낭 조직에서는 동소 mRNA 보합결합법과 면역조직 화학적 염색법 모두에서 Malassez 상피세포 잔존물에 강하게 염색이 되었고, 그 외의 주위 조직에서는 발현되지 않았다. 이상의 결과에서 볼 때, 염증성 치은 상피에서 EGFR의 과발현과 치낭 조직의 Malassez 상피세포 잔존물에서 다량의 EGFR이 존재하는 것으로 미루어, 이는 구강 환경에 가해질 수 있는 손상에 대하여 생체의 항상성을 유지하기 위한 반응으로 여겨진다.

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Expression of Functional Pentameric Heat-Labile Enterotoxin B Subunit of Escherichia coli in Saccharomyces cerevisiae

  • Lim, Jung-Gu;Kim, Jung-Ae;Chung, Hea-Jong;Kim, Tae-Geum;Kim, Jung-Mi;Lee, Kyung-Ryul;Park, Seung-Moon;Yang, Moon-Sik;Kim, Dae-Hyuk
    • Journal of Microbiology and Biotechnology
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    • 제19권5호
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    • pp.502-510
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    • 2009
  • Although the Escherichia coli heat-labile enterotoxin B subunit (LTB) has already been expressed in several different systems, including prokaryotic and eukaryotic organisms, studies regarding the synthesis of LTB into oligomeric structures of pentameric size in the budding yeast Saccharomyces cerevisiae have been limited. Therefore, this study used a functional signal peptide of the amylase 1A protein from rice to direct the yeast-expressed LTB towards the endoplasmci reticulum to oligomerize with the expected pentameric size. The expression and assembly of the recombinant LTB were confirmed in both the cell-free extract and culture media of the recombinant strain using a Western blot analysis. The binding of the LTB pentamers to intestinal epithelial cell membrane glycolipid receptors was further verified using a GM1-ganglioside enzyme-linked inmmunosorbent assay (GM1-ELISA). On the basis of the GM1-ELISA results, pentameric LTB proteins comprised approximately 0.5-2.0% of the total soluble proteins, and the maximum quantity of secreted LTB was estimated to be 3 mg/l after a 3-day cultivation period. Consequently, the synthesis of LTB monomers and their assembly into biologically active aligomers in a recombinant S. cerevisiae strain demonstrated the feasibility of using a GRAS microorganism-based adjuvant, as well as the development of carriers against mucosal disease.

The effects of PEP-1-FK506BP on dry eye disease in a rat model

  • Kim, Dae Won;Lee, Sung Ho;Ku, Sae Kwang;Lee, Ji Eun;Cha, Hyun Ju;Youn, Jong Kyu;Kwon, Hyeok Yil;Park, Jong Hoon;Park, Eun Young;Cho, Sung-Woo;Han, Kyu Hyung;Park, Jinseu;Eum, Won Sik;Choi, Soo Young
    • BMB Reports
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    • 제48권3호
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    • pp.153-158
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    • 2015
  • As FK506 binding proteins (FK506BPs) are known to play an important role in the regulation of a variety of biological processes related to cell survival, this study was designed to examined the protective effects of FK506 binding protein 12 (FK506BP) on low humidity air flow induced dry eye in a rat model using transduced PEP-1-FK506BP. After the topical application of PEP-1-FK506BP, tear volumes were markedly increased and significant prevention of cornea damage was observed compared with dry eye rats. Further, immunohistochemical analysis demonstrated that PEP-1-FK506BP markedly prevented damage to the cornea, the bulbar conjunctiva, and the palpebral conjunctiva epithelial lining compared with dry eye rats. In addition, caspase-3 and PARP expression levels were found to be decreased. These results demonstrated that topical application of PEP-1-FK506BP significantly ameliorates dry eye injury in an animal model. Thus, we suggest that PEP-1-FK506BP can be developed as a new ophthalmic drop to treat dry eye diseases.