• Title/Summary/Keyword: Biomedicine

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Dehydroepiandrosterone and cortisol concentrations in the cerebrospinal fluid of dogs

  • Mongillo, Paolo;Bernardini, Marco;Prana, Elisa;Balducci, Federica;Gabai, Gianfranco;Marinelli, Lieta
    • Korean Journal of Veterinary Research
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    • v.57 no.1
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    • pp.47-50
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    • 2017
  • Concentrations of cortisol, dehydroepiandrosterone and dehydroepiandrosterone-sulfate were measured by performing radioimmunoassay of the cerebrospinal fluid of 68 dogs diagnosed with idiopathic epilepsy or inflammatory, degenerative, or non-neurological disease. No steroid concentration differences were found among diagnoses. Dehydroepiandrosterone and dehydroepiandrosterone-sulfate concentrations were higher in males than in females and dehydroepiandrosterone-sulfate decreased with increasing age. No sex or age effects were observed on cortisol or hormone ratios. Although limited to a relatively small sample, our results show sex- and age-dependent variations in these neurosteroid concentrations in cerebrospinal fluid. The role of such variations in the pathophysiology of the dog brain warrants further investigation.

Dieckol, a Component of Ecklonia cava, Suppresses the Production of MDC/CCL22 via Down-Regulating STAT1 Pathway in Interferon-γ Stimulated HaCaT Human Keratinocytes

  • Kang, Na-Jin;Koo, Dong-Hwan;Kang, Gyeoung-Jin;Han, Sang-Chul;Lee, Bang-Won;Koh, Young-Sang;Hyun, Jin-Won;Lee, Nam-Ho;Ko, Mi-Hee;Kang, Hee-Kyoung;Yoo, Eun-Sook
    • Biomolecules & Therapeutics
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    • v.23 no.3
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    • pp.238-244
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    • 2015
  • Macrophage-derived chemokine, C-C motif chemokine 22 (MDC/CCL22), is one of the inflammatory chemokines that controls the movement of monocytes, monocyte-derived dendritic cells, and natural killer cells. Serum and skin MDC/CCL22 levels are elevated in atopic dermatitis, which suggests that the chemokines produced from keratinocytes are responsible for attracting inflammatory lymphocytes to the skin. A major signaling pathway in the interferon-${\gamma}$ (IFN-${\gamma}$)-stimulated inflammation response involves the signal transducers and activators of transcription 1 (STAT1). In the present study, we investigated the anti-inflammatory effect of dieckol and its possible action mechanisms in the category of skin inflammation including atopic dermatitis. Dieckol inhibited MDC/CCL22 production induced by IFN-${\gamma}$ (10 ng/mL) in a dose dependent manner. Dieckol (5 and $10{\mu}M$) suppressed the phosphorylation and the nuclear translocation of STAT1. These results suggest that dieckol exhibits anti-inflammatory effect via the down-regulation of STAT1 activation.

Ceramium boydenii, a Red Alga, Inhibits MDC/CCL22 Production Via Suppression of STAT1 Activation in HaCaT Keratinocyte (HaCaT 각질형성세포에서 홍조류인 단박(Ceramium boydenii)의 STAT1 활성 억제를 통한 MDC/CCL22 생성 억제 효과)

  • Kang, Na-Jin;Kang, Gyeung-Jin;Han, Sang-Chul;Hyun, Eun-A;Koo, Dong-Hwan;Koh, Young-Sang;Ko, Mi-Hee;Hyun, Jin Won;Kang, Hee-Kyoung;Yoo, Eun-Sook
    • Korean Journal of Pharmacognosy
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    • v.44 no.2
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    • pp.154-160
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    • 2013
  • Ceramium boydenii belongs to euphorbia humitusa of red algae, and is distributed along the coast of Jeju island. This study was conducted to examine the anti-inflammatory effect and action mechanism of C. boydenii in the human keratinocyte cell line HaCaT. The 80% EtOH extract of C. boydenii inhibits the production of MDC (macrophage derived chemokine), an inflammatory chemokine, induced by IFN-${\gamma}$ and TNF-${\alpha}$ in a concentration dependent manner. It also suppressed the phosphorylation and nuclear translocation of STAT1, a key transcription factor in IFN-${\gamma}$ and TNF-${\alpha}$ signaling pathway, at the effective concentrations. These results suggest that C. boydenii demonstrates the anti-inflammatory activity via the suppression of STAT1 activation and has the significant value as an anti-inflammatory source.

Bacterial Osteomyelitis Induced by Morganella morganii in a Bearded Dragon (Pogona vitticeps)

  • Kwon, Jun;Kim, Sang Wha;Kim, Sang Guen;Kim, Hyoun Joong;Giri, Sib Sankar;Park, Se Chang
    • Journal of Veterinary Clinics
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    • v.37 no.6
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    • pp.342-344
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    • 2020
  • Bacterial osteomyelitis-or bacterial infection of the bone-is common in reptiles. Unfortunately, its treatment is challenging despite advances in diagnostic and medical technologies. Herein, we present the case of a sexually mature female bearded dragon (Pogona vitticeps) with left forelimb elbow joint stiffness. We diagnosed the reptile with a eft elbow joint traumatic structural abnormality based on gross examination and evaluation of radiographs. Treatment with clindamycin and cephalexin for bacterial infection failed and the reptile died. Necropsy revealed the causative bacteria as Morganella morganii. Treatment of osteomyelitis is typically focused against Staphylococcus aureus as it the most common cause of traumatic bone infection. However, M. morganii, the causative bacterium in this case, has a natural resistance to clindamycin and cephalexin. Recently, these bacteria have begun to appear in clinical reports, more commonly as the causative organisms of bone infections. M. morganii should be considered as a potential cause of infection. Furthermore, antibiotic treatment in such cases should be based on bacterial culture and susceptibility tests.

A study of Liability for LMO and Biomedicine (LMO에 대한 손해배상책임 - 바이오신약을 중심으로)

  • Moon, Sang-Hyuk
    • The Korean Society of Law and Medicine
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    • v.12 no.1
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    • pp.43-67
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    • 2011
  • Humankind history is faced with one gigantic turning point due to development of Living genetically Modified Organisms. Food production by means of LMO is on the acceleration in an effort to solve the shortage of food problems. Food is also used as alternative energy source. Use of LMO product is not only limited to food and energy, but is actively utilized in various fields of medicines. This paper is first to check out the state of biomedicine developed and associated problems from industries that use LMO, after which we made an attempt on legislative approach to find out means of relief, through examples of such laws legislated for the sufferer from the adverse effect of the biomedicine. As for the liable subject to bear the responsibility for compensatory damage in a way of relieving the victim owing to adverse effect of biomedicine, those who manufactured and sold biomedicine and who are related to the damage to the victim due to the accident and medical doctors and pharmacists who prescribe and administer the medicine in question have been looked into. Accidents involving medicines and medical supplies could take place without reason for imputation on part of the liable subjects or fault of the victim, in which case the victim can't receive damage compensation from any of both parties. When such accidents happened turn out to be no fault accidents, introduction of damage relief measures might have to be reviewed against side effects of medicine and medical supplies as no fault compensation in order for actual relief to be possible. Talking about technicality of legislation, we can suggest a method of strengthening the accountability of manufacturer for stereotypical agenda on biomedicines by newly legislating special regulation with an issue that resists claim on risks associated with the development of medicine and incorporating the same into Manufactured Product Liability Law. After all, when an accident happens associated with biomedicine, the damage will be done to the consumer. And the consumer will be exposed to fatal danger even without the time to cope with potential risks associated with medicine and medical supplies they take. Therefore, it is necessary to protect the potential victim by having the manufacturer of biomedicines bear the liability of medical risks.

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Principles and Medical Applications of Biomedical Photoacoustic Tomography (의료용 광음향 단층촬영 원리와 의학적 응용)

  • Song, Chul-Gyu;Ryu, Sang-Hun;Kim, Do-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.6
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    • pp.1209-1214
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    • 2011
  • Photoacoustics has been broadly studied in biomedicine, for both human and small animal tissues. Photoacoustics uniquely combines the absorption contrast of light or radio frequency waves with ultrasound resolution. Moreover, it is non-ionizing and non-invasive, and is the fastest growing new biomedical method, with clinical applications on the way. This paper provides a brief recap of recent developments in photoacoustics in biomedicine, from basic principles to applications. The emphasized areas include the new imaging modalities as well as translational research topics. A primary PA application in biomedicine is photoacoustic tomography (PAT). The past decade has seen fast developments in both theoretical reconstruction algorithms and innovative imaging techniques, and PAT has been implemented in imaging different tissues, from centimeter-large breast tumors to several micrometer-large single red blood cels (RBC). PAT now provides structural, functional and molecular imaging. Overall, PA techniques for biomedicine are maturing. They have been widely used to study both animal and human tissues. Recently, more and more research focuses on clinical applications. Commercialized PA systems are expected to be available in the near future, and wide clinical PA applications are foreseen.

HPV Infection and Cervical Abnormalities in HIV Positive Women in Different Regions of Brazil, a Middle-Income Country

  • Freitas, Beatriz C;Suehiro, Tamy T;Consolaro, Marcia EL;Silva, Vania RS
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.18
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    • pp.8085-8091
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    • 2016
  • Human papillomavirus is a virus that is distributed worldwide, and persistent infection with high-risk genotypes (HR-HPV) is considered the most important factor for the development of squamous cell cervical carcinoma (SCC). However, by itself, it is not sufficient, and other factors may contribute to the onset and progression of lesions. For example, infection with other sexually transmitted diseases such as human immunodeficiency virus (HIV) may be a factor. Previous studies have shown the relationship between HPV infection and SCC development among HIV-infected women in many regions of the world, with great emphasis on low- and middle-income countries (LMICs). Brazil is considered a LMIC and has great disparities across different regions. The purpose of this review was to highlight the current knowledge about HPV infection and cervical abnormalities in HIV+ women in Brazil because this country is an ideal setting to evaluate HIV impact on SCC development and serves as model of LMICs and low-resource settings.

New Compounds from Euphorbia helioscopia and Absolute Configuration Determination by Computational Methods

  • He, Jiang-Bo;Zhu, Hua-Jie;Luo, Gui-Fen;Liu, Guang-Ming;Chen, Hao;Li, Yan;Chen, Shaopeng;Lu, Xin;Zhou, Guochun;Cheng, Yong-Xian
    • Bulletin of the Korean Chemical Society
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    • v.31 no.8
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    • pp.2211-2214
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    • 2010
  • The whole plant of Euphorbia helioscopia is an important traditional Chinese medicine. Fom its BuOH soluble extract, one new lactam (1), three new terpenoids (2-4) including a new naturally occurring compound, and three known compounds were isolated. Their structures were identified by spectroscopic evidences. In particular, the absolute configurations of side chain of compounds 1 and 2 were determined using computational methods.

One-Step Engineering of a Stable, Selectable Marker-Free Autoluminescent Acinetobacter baumannii for Rapid Continuous Assessment of Drug Activity

  • Jiang, Huofeng;Gao, Yamin;Zeng, Sheng;Wang, Shuai;Cao, Zhizhong;Tan, Yaoju;Yin, Huancai;Liu, Jianxiong;Zhang, Tianyu
    • Journal of Microbiology and Biotechnology
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    • v.29 no.9
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    • pp.1488-1493
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    • 2019
  • The rising cases of multidrug-resistant Acinetobacter baumannii (Ab) and the lack of effective drugs call for quick attention. Here, based on a Tn7 transposon and Xer/dif system, we constructed a stable, selectable marker-free autoluminescent Ab capable of producing visible light without extra substrates. Utilization of this autoluminescent reporter strain has the potential to reduce the time, effort and costs required for the evaluation of activities of anti-Ab drug candidates in vitro.