• Bulletin of the Korean Chemical Society
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• 제23권3호
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• pp.454-458
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• 2002

Furo[3,2-h]quinoline derivatives were synthesized as a gastric $H^+$/$K^+$-ATPase inhibitors. The oxycyclization of 7 and 8-positions in quinoline potentiated the inhibitory activity, while no significant changes in biological activity were observed by the variation of substituents in furan ring. The several furo[3,2-h]quinoline derivatives were worthy of in vivo investigation for their anti-secretory and anti-ulcer activity.

• Parasites, Hosts and Diseases
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• 제45권1호
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• pp.19-26
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• 2007

This study describes the isolation of a Toxocara canis species-specific excretory-secretory(ES) antigen and the development of an enzyme-linked immunosorbent assay(ELISA) based on this antigen. Analysis of the ES antigens of T. canis, Toxocara vitulorum, Ascaris lumbricoides and Necator americanus larval antigen was performed by SDS-PAGE followed by western blotting. A 57 kDa T. canis-specific antibody fraction(TcES-57) was identified by western blotting and labelling with anti-Toxocara antibodies(from experimental rabbits and human patients) and tracing with anti-human or anti-rabbit peroxidase conjugate. No protein fraction of 57 kDa was detected in ES or larval antigens collected from T. canis, T. vitulorum, A. lumbricoides and N. americanus. Using TcES-57, a specific anti-serum was produced in rabbits and a double sandwich ELISA was developed. This test was validated using known seropositive sera from toxocariasis patients, sera from A. lumbricoides or N. americanus patients, and 50 serum samples from cats. These tests revealed that TcES-57 antigen is specific to T. canis infection and does not cross react with sera of other related infections. Thus, ELISA based on TcES-57 antigen was proven to be an effective tool in the diagnosis of toxocariasis and studies on the role of T. canis in the epidemiology of human toxocariasis.

• Molecules and Cells
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• 제40권9호
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• pp.607-612
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• 2017

When mammalian cells and animals face a variety of internal or external stresses, they need to make homeostatic changes so as to cope with various stresses. To this end, mammalian cells are equipped with two critical stress responses, autophagy and cellular senescence. Autophagy and cellular senescence share a number of stimuli including telomere shortening, DNA damage, oncogenic stress and oxidative stress, suggesting their intimate relationship. Autophagy is originally thought to suppress cellular senescence by removing damaged macromolecules or organelles, yet recent studies also indicated that autophagy promotes cellular senescence by facilitating the synthesis of senescence-associated secretory proteins. These seemingly opposite roles of autophagy may reflect a complex picture of autophagic regulation on cellular senescence, including different types of autophagy or a unique spatiotemporal activation of autophagy. Thus, a better understanding of autophagy process will lead us to not only elucidate the conundrum how autophagy plays dual roles in the regulation of cellular senescence but also helps the development of new therapeutic strategies for many human diseases associated with cellular senescence. We address the pro-senescence and anti-senescence roles of autophagy while focusing on the potential mechanistic aspects of this complex relationship between autophagy and cellular senescence.

• Asian-Australasian Journal of Animal Sciences
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• 제6권2호
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• pp.211-218
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• 1993

The effect of active immunization against porcine somatostatin (SRIF-14) on somatostation and somatotropin secretion profile in 18 gilts was investigated. Gilts were assigned to the following treatments: control (sham injection, n = 6); bovine serum albumin (BSA) (injection of BSA with bacterial protein adjuvant, n = 6); SRIF (injection of BSA-SRIF-14 conjugate with bacterial protein adjuvant n = 6). Serum SRIF and pST were assayed from the blood samples taken on day 7 after the last immunization injection. Anti-SRIF antibody titres were assayed in weekly samples two weeks after the initial immunization to one week after the last immunization. Results revealed that the immunization protocol used in the present investigation failed to produce antibodies capable of neutralizing endogenous somatostatin. In addition, the porcine somatotropin assay revealed no significant differences in baseline pST concentration, mean peak amplitude and number of peaks during a 24 h secretory period among SRIF, BSA and control treatment. There were also no differences in SRIF baseline concentration, peak amplitude, and number of peaks during a 24 h secretory period among any of the three treatments. Circulating concentrations of pST and pSRIF were highly correlated (r = -0.09). Furthermore, anti-SRIF antibody titre was not detected in the serum of the gilts actively immunized against SRIF. These data, collectively, suggest that the protocol employed in the present investigation for active immunization against SRIF is not an effective method for changing SRIF and pST secretion profiles of the gilt and thus to enhance performance.

• Imaging Science in Dentistry
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• 제54권2호
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• pp.211-220
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• 2024

Non-secretory multiple myeloma (NSMM) is a rare cancer of plasma cells characterized by the absence of detectable monoclonal M protein in the blood or urine. A 57-year-old woman presented with mandibular pain but without intraoral swelling. Imaging studies revealed multiple osteolytic lesions in her mandible and pronounced root resorption of the left mandibular second molar. Biopsy results showed atypical plasmacytoid cells positive for anti-kappa, CD138, MUM1, and CD79a antibodies, but negative for anti-lambda and CD20. These results were indicative of a malignant plasma cell neoplasm. No abnormalities were revealed by free light chain assay or by serum or urine protein electrophoresis, leading to a diagnosis of NSMM. The patient began chemotherapy in conjunction with bisphosphonate therapy and achieved remission following treatment. This case underscores the critical role of dentists in the early detection and prevention of NSMM complications, as the disease can initially present in the oral cavity.

• 대한본초학회지
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• 제22권3호
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• pp.101-107
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• 2007

Objective : This study was carried out to investigate diagnostic difference and anti-oxidative effect of 3 different Anemarrhenae Rhizoma (AR) extracts. Methods : Microscopic examination was used to distinguish histological differences. And eliminative ability of several kinds of free radicals was also measured. Results : In microscopic examination, we can distinguished three different lineage of AR with different structure of vascular bundles and secretory structures. The extract of AR show profitable abilities of elimination of DPPH free radical, ABTS free radical and hydrogen peroxide. Conclusion : So, it can be concluded that AR extract has an anti-oxidative effects. Especially indeciduous lineage was most effective to remove free radicals.

• Biomolecules & Therapeutics
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• 제12권1호
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• pp.1-8
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• 2004

In chronic airway inflammatory diseases such as asthma and chronic bronchitis, it has been suggested that matrix metalloproteinases secreted from infiltrating neutrophil contribute the pathogenesis of the disease and have been a focus of intense investigation. We report here that hamster tracheal surface epithelial goblet cells (HTSE cells) produce matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-2 (TIMP-2). Matrix metalloproteinase activities were investigated using [$^3H$]collagen-digestion assay and gelatin zymography. The subtype of matrix metalloproteinases expressed from HTSE cells was MMP-2 (gelatinase A), which was determined by Western blot with various subtype selective anti-matrix metalloproteinase antibodies. The MMP-2 and TIMP-2 cDNAs from HTSE cells were partially cloned by RT-PCR and they reveal more than 90% of sequence homology with those from human, rat and mouse. The collagenolytic activity was increased with the secretory differentiation of the HTSE cell and it was found that zymogen activation was responsible for the increased MMP-2 activity in HTSE cells. The results from the present study suggest that the metaplastic secretory differentiation of airway goblet cells may affect chronic airway inflammatory process by augmenting the zymogen activation of MMP-2.

• Applied Microscopy
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• 제38권3호
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• pp.221-233
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• 2008

산화질소는 생물체내에서 생리적이나 병리학적으로 중요한 역할을 한다고 알려져 있으며, 특히 침샘조직에서 침분비작용과 샘혈류 조절에 중요한 인자의 하나로 관여함이 알려져 있다. 산화질소합성효소 (nitric oxide synthase, NOS)는 동위효소로서 내피산화질소합성효소 (endothelial NOS, eNOS), 신경산화질소합성효소 (neuronal NOS, nNOS)와 유도산화질소합성효소 (inducible NOS, iNOS)가 있으며, 세포내에서 내인성산화질소를 합성한다고 알려져 있다. 그러나 산화질소합성효소의 세포내 분포에 관한 전자현미경적 연구는 매우 드물며, 흰쥐 침샘에서의 산화질소생산효소(NOS)에 대한 전자현미경적 연구는 없었다. 흰쥐 침샘에서 NOS의 세포내 분포를 규명하기 위하여 면역전자현미경방법을 이용한 금입자표지법을 시행하여 아래와 같은 결과를 얻었다. eNOS에 양성 면역반응을 보이는 구조는 침샘의 분비세포 중 장액세포에 있는 전자밀도가 높은 분비과립이었으며, 점액분비세포의 점액분비과립에서는 비교적 약한 면역반응성이 관찰되었다. 즉 턱밑샘과 혀밑샘을 구성하고 있는 두 종류의 분비세포 중 장액세포의 분비과립에 금입자가 비교적 많이 표지되었으며, 점액세포의 분비과립에서는 적은 수의 금입자가 관찰되었고, 침샘의 소엽속관 (intralobular duct)의 전자밀도가 높은 분비과립에서도 금입자가 표지된 것이 관찰되었다. 귀밑샘에서도 장액세포의 분비과립과 소엽속관의 분비과립에 금입자가 표지되었다. nNOS의 양성 면역반응은 턱밑샘에서 점액세포의 분비과립에서만 약간의 금입자가 관찰되었으며, 턱밑샘, 혀밑샘 및 귀밑샘의 분비세포와 분비관세포에서는 iNOS에 대한 양성 면역반응이 관찰되지 않았다. 흰쥐 침샘에서 산화질소합성효소 중 eNOS는 침샘분비세포의 분비과립에 존재하며, 특히 전자밀도가 높은 장액성분비과립에 주로 분포하고 있으며, 분비관 중에서 소엽속관에도 분포하고 있는 것이 관찰되었으나, 다른 동위효소인 nNOS와 iNOS는 거의 관찰되지 않았다. 산화질소합성효소가 흰쥐 침샘분비세포의 분비과립과 소엽속관의 분비과립에 분포하고 있는 것으로 보아 침샘에서 산화질소가 침의 생산과 분비에 중요한 역할을 담당하는 것으로 생각된다.

• Archives of Pharmacal Research
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• 제22권2호
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• pp.137-142
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• 1999

Anti-ulcer activity of newly synthesized acylquinoline derivatives was investigated. For the in vitro screening, the effects of compounds on gastric $H^{+}/K^{+}$ ATPase isolated from hog and rabbit were examined. Among them, AU-090, AU-091, AU-254, AU-413 and AU-466 exhibited good in vitro activity on both enzymes. To correlate the in vitro activity with in vivo action, the effects of the compounds on the basal gastric acid secretion were studied. Some derivatives showed considerable anti-secretory activities, and AU-413 was selected for further studies. AU-413 protected gastric damage induced by either ethanol or NaOH dose dependently when given orally. $ED_{50}$ values of 12 mg/kg, p.o. (ethanol) and 41 mg/kg, p.o. (NaOH) were obtained. In addition, histamine-stimulated gastric secretion was reduced upon AU-413 administration. Taken together, newly synthesized acylquinoline derivatives, especially AU-413, is worthy of further investigation to be developed as an anti-ulcer agent.

• 혜화의학회지
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• 제15권1호
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• pp.141-160
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• 2006

The obtained results are summarized as follows 1. New findings are reporting year by year as for the study related to Anti-inflammatory mechanism of Bee Venom therapy. 2. The Anti-inflammatory effect of Bee Venom therapy is achieved through counterirritation, stimulations to adrenal cortex, immuno-regulation, antioxidation, removal of free radicals, modulation of AGP gene induction. 3. The chief components of Bee Venom related to Anti-inflammatory effect are Melittin, MCD peptide, Apamin, Adolapin etc. 4. Melittin binds to secretory phospholipase A2 and inhibits its enzymatic activity. 5. Melittin blocks neutophil O2-production. 6. MCD peptide(Peptide 401) stimulates the mast cell secrets histamine, Anti-inflammatory effect caused by this is 'conterirritation'. 7. Melittin & Apamin have an anti-inflammatory effect by inducing cortisone secretion. 8. MCD peptide & Apamin increase immunologic fuction by stimulating hypophysis & adrenal cortex and have an anti-inflammatory effect by inhibiting synthesis of prostaglandin from arachidonic acid. 9. Adolapin have an anti-inflammatory effect by inhibiting COX. 10. Bee Venom have an anti-inflammatory effect by suppressing AGP($\alpha$-acid glycoprotein). 11. Bee Venom have an anti-inflammatory effect by inhibiting NO, iNOS, PLA2, COX-2, TNF-$\alpha$, IL-1, NF-${\kappa}B$, MAP kinase.