• Journal of Periodontal and Implant Science
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• 제35권1호
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• pp.99-109
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• 2005

It has been focused on the importance of the host inflammatory response in periodontal pathogenesis and progression, treatment has been introduced to control the host response and the method, which diminishes production and activity of MMP by doxycycline, has been used in periodontal field. MMP is a proteolytic enzyme which plays a major role in tissue destruction and MMP-1 is secreted in the periodontally healthy tissue, while MMP-8, 9, 13, etc in the inflammatory state. Among these, MMP-13 has been discovered lately and reported to degrade primarily type II collagen. Periodontal ligament (PDL) cell plays a role in destruction of periodontal tissue. This study was to evaluate the effect of doxycycline and mefenamic acid, non-steroidal antiinflammatory drug on MMP-13 mRNA expression in the rat PDL cell. Doxycycline concentration of $1{\sim}100\;{\mu}g/ml$ was added rat PDL cell and cell activity was measured by MIT assay at day 1 and 3. MMP-13 gene expression was evaluated by RT-PCR after PDL cells were pre-treated for 1hour with doxycycline (50 ${\mu}g/ml$) alone or with mefenamic acid ($10^{-6}M$), then added $IL-1{\beta}$(1.0 ng/ml) and incubated for 16-18 hours. The results are as follows: 1. Cell activity decreased Significantly at 24 and 72 hours in 100 ${\mu}g/ml$ (p<0.05). 2. Level of MMP-13 mRNA was in 20.2% increase by $IL-1{\beta}$ and in pre-treating doxycycline group, expression of $IL-1{\beta}$ induced MMP-13 mRNA was inhibited by 31% than $IL-1{\beta}$ treated only. 3. Mefenamic acid did not inhibit on the expression of $IL-1{\beta}$ induced MMP-13 mRNA, while mefenamic acid in combination with doxycycline inhibited the expression by 41% compared to only $IL-1{\beta}$ stimulation. These results suggest that doxycycline synergistically inhibit the expression of $IL-1{\beta}$ induced MMP-13 mRNA in combination with mefenamic acid.

• Journal of Pharmaceutical Investigation
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• 제31권4호
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• pp.233-239
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• 2001

Local drug delivery by using biocompatible polymers has been developed in the treatment of periodontitis for many years. In the field of dental therapy, doxycycline is usually a first choice because of its broad-spectrum antibiotic activity. The strip releases antibiotics for a week, and the polymer should be degradable after a week. In this study, we prepared and evaluated the chitosan strips and nanoparticle strips containing doxycycline hydrochloride, and studied their antiacterial activity, dissoultion, and degrability in vitro. The weight of cast strip containing a 5 mg of doxycycline hydrochloride and a 45 mg of chitosan polymer was $57.67{\pm}0.17\;mg$. The release rate of doxycycline hydrochloride from the strip was measured by HPLC. The drug released from chitosan strip and nanoparticle strip was shown to be $50\;{\mu}g/mL$ in first 24 hours. In antibacterial test showed growth inhibitory activity after 24 hrs anaerobic incubation. In vitro degradability showed demolished weight of $93.74{\pm}0.08%$ chitosan strip, $82.48{\pm}1.29%$ chitosan nanoparticle strip, $2.47{\pm}1.99%$ polycarprolactione strip (control). These results showed that, with this doxycycline hydrochloride strip, it is feasible to obtain a sustained release of the drug within the periodontal pocket for seven days which may be improve for local drug delivery system for treatment of periodontal disease.

• Tuberculosis and Respiratory Diseases
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• 제41권5호
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• pp.531-536
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• 1994

연구배경 : Tetracycline의 흉막강내 주입은 오랫동안 악성 흉막삼출액이나 재발성 기흉을 가진 환자에게 화학적 흉막유착술의 가장 흔한 방법으로 사용되어왔다. 그러나 최근 주사용 tetracycline의 제조가 중단됨에 따라 이를 대체할만한 시약이 필요하게 되었으며, 이에 저자들은 같은 계열의 약제인 doxycycline을 토끼의 흉막강에 주입하여 이의 흉막유착효과를 tetracycline과 비교하고자 하였다. 방법: 평균 2.6 kg의 뉴질랜드 백색 토끼 18 마리를 여섯 마리씩 세 군으로 나누어 각 군에 tetracycline 20 mg/ml/kg, doxycycline 7 mg/ml/kg, doxycycline 20 mg/ml/kg를 우측 흉막강에 주입한 후 제 28일에 개흉술을 시행하여 흉막유착 정도를 비교하였다. 결과: 1) Tetracycline 20 mg/ml/kg를 주입한 여섯 마리의 토끼 중 다섯 마리는 여러 개의 섬유대에 의한 국소적인 흉막유착을 보였으며 나머지 한 마리는 사망하였다. 2) Doxycycline 7 mg/ml/kg를 주입한 여섯 마리의 토끼 중 세 마리는 국소적 흉막유착을 보였으며 나머지 세 마리는 섬유조직에 의한 치밀한 흉막유착을 보였다. 3) Doxycycline 20 mg/ml/kg를 주입한 여섯 마리의 토끼 중 두 마리는 치밀한 흉막유착을 보였으며, 다른 두 마리는 치밀한 흉막유착과 함께 기저 폐실질의 괴사를 보였고 나머지 두 마리는 사망하였다. 결론 : Doxycycline의 흉막유착효과는 tetracycline에 비해 대등하거나 더 강력한 것으로 생각되며, 7mg/ml/kg의 용량으로 별다른 부작용 없이 충분한 흉막유착효과가 얻어졌다.

• Journal of Yeungnam Medical Science
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• 제37권2호
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• pp.112-121
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• 2020

Background: Vancomycin-resistant Enterococcus (VRE) has become more common in nosocomial infections, especially in urine samples. However, until now, no treatment regimen has been proven to effectively eradicate urine VRE colonization. Therefore, to evaluate the efficacy of doxycycline in eradicating urine VRE and shortening VRE isolation period, we compared VRE colony detection period between doxycycline-treated and untreated patients. Methods: A retrospective cohort study of 83 patients with VRE colonization in urine cultures was conducted at a tertiary academic hospital from January 2011 to February 2018. Kaplan-Meier survival analysis was used to evaluate eradication rates in the treatment and non-treatment groups. Factors affecting urine VRE colonization persistence were analyzed by multiple logistic regression analysis. Results: The overall rate of VRE eradication during the entire hospital stay was higher in the doxycycline treatment group (90.5%) than in the non-treatment group (58.1%, p=0.014). Survival analysis showed that the 5-, 10-, and 20-day cumulative eradication rates were 78.3%, 100%, and 100% in the doxycycline treatment group, and 18.5%, 45.7%, and 67.8% in the non-treatment group, respectively, thereby indicating that eradication rates were higher in the doxycycline treatment group than in the non-treatment group (p<0.001). Only doxycycline treatment was shown to affect urine VRE colonization persistence in multivariate logistic regression analysis. Conclusion: Doxycycline treatment enhanced the eradication rate of urine VRE colonization and appeared to be useful in shortening VRE isolation period.

• 한국미생물·생명공학회지
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• 제32권1호
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• pp.11-15
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• 2004

본 연구에서는 C. diphtheriae toxin-A(DTA)를 합성하는 유전자를 tetracycline derivative인 doxycycline에 의해 발현이 유도되는 plasmid('Tet-on' system)에 삽입시켜, 이를 mouse ES cell에 도입시켰으며, 이렇게 제작된 mouse ES cell이 doxycycline의 처리 농도에 따라 mouse ES cell내의 DTA의 발현이 유도되어 이 결과 세포 사별(apoptosis)을 유발시키는 것을 MTT assay를 통해 확인하였다.

• Environmental Analysis Health and Toxicology
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• 제4권1_2호
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• pp.1-10
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• 1989

Experiments were performed on mice to investigate the influences of doxycycine and ethanol on the immune responses. Doxycycline was injected intraperitoneally and ethanol was administered in the drinking water. Mice were sensitized and challenged with sheep red blood cells. Immune responses were evaluated by humoral immunity, cellular immunity, peripheral circulating white blood cell and phagocyte activity. Pathotoxicological influences were measured by serum protein and albumin. The weight of spleen, thymus and liver were measured. Doxycline and ethanol combined administration decreased the weight of thymus and spleen. Humoral and cellular immune response were reduced by doxycycline administration. Especially ethanol combined administration significantly reduced humoral and cellular immune response. Phagocyte activity was increased by ethanol combined administration and peripheral circulating white blood cell was significantly increased by ethanol adminstration. Ethanol combined administration decreased serum A/G ratio.

• 대한한의학회지
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• 제21권4호
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• pp.292-299
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• 2000

We experienced two cases of Tsutsugamushi disease which occurred in October, 2000. The patients, who were over 70 years old and living in a rural area, visited Wonkwang University Oriental Chonju Medicine Hospital because of suffering fever, chill, skin rash, abdominal discomfort, and general weakness for a duration of seven days. The diagnosis was confmned as Tsutsugamushi disease by clinical findings such as eschar and high antibody titers on Reverse Passive Hemagglutination(RPHA). As for treatment, we used Sengmagalgentang-gamibang during the acute and Chojungikitang during convalescent phases of the illness. The patients were treated with Doxycycline of western medicine. The patients improved within 3 days of admission and were discharged within one week.

• Journal of Chest Surgery
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• 제29권1호
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• pp.59-62
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• 1996

비디오 흥강경을 이용한 기흥환자의 기포절제 수술에서 수술성적을 높힐 수 있는 한 방편으로 doxycycline을 사용한 화학적 늑막유착술을 함께 시행하여왔다. 그러나 doxycycline을 사용한 늑막유착술의 효과에 대해 아직 잘 알려져 있지 않다. 본 교실에서는 1993년 9월 부터 1995년 6월 까지 본원에서 기흥으로 입원하여 비디오 흥강경으로 기포절제술을 시행한 41명중 doxycycline으로 늑막유착술을 동시에 시행한 21명 (group I)과 시 행하지 않은 20명 (group II)을 비교하여 보았다. Doxycycline을 사용한 늑막유착술은 기포절제가 끝난후 doxycycline 500mg을 생리식염수 200m1에 섞어 흥강내에 30분에서 1시간 잔류시킨 후 배액하였다. Group I과 group II의 연령은 각각 30.9 $\pm$ 20.0세와 24.3 $\pm$ 9.49세였고 남여 비는 각각 20:1과 20:0 였다. 술후 흥강삽관 기간은 group I과 group II가 각각 5.86 $\pm$ 4.69일과 3.80 $\pm$2.28일 이었다. 흥관을 통해 술후 3일째 하루 100m1 이상의 흥수가 배액되는 환자의 수는 group 에서 7명 이고 group II서 1명이었으며, 또한 7일 이상 흥관을 제거하지 못한 환자는 group I이 5명이고 group II가 2명 이었다. 술후 발\ulcorner을 보인 환자수는 group I과 group II가 각각 3명 이었다. 술후 진통제 투여량은 group I이 2.19 $\pm$ 2.77amp1es 이며 group II가 2.30 $\pm$ 1.95amp1e 이었다. 추적관찰 동안 group I이 2명, group II가 2명 재발하여 각각 9.5%와 10%의 재발율을 보였다. 본 연구결과 기흥환자에서 비디오 흉강경을 이용한 기포절제술과 동시에 시행한 doxycycline을 이용한 늑막유착술은 필요치 않다는 결론을 얻었다.

• Journal of Periodontal and Implant Science
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• 제30권2호
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• pp.335-347
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• 2000

치주질환의 진행에 따른 치주조직파괴에 있어 치주조직내 다양한 세포외기질성분을 분해하는 matrix metalloproteinase-3(MMP-3)는 염증반응에 관여하는 세포들로부터 분비된 interleukin-$1{\beta}$(IL-$1{\beta}$)에 의해 유도될 수 있다. 이전 연구에서 치주인대세포에서의 MMP-3 생성이 tetracycline 및 tetracycline 유도체에 의하여 억제될 수 있음이 보고되었다. 이 연구의 목적은 metronidazole 및 doxycycline-HCl을 적용한 후 치은섬유아세포에 IL $1{\beta}$를 적용하여 MMP-3의 생성을 유도한 후 이들 약물들이 치은섬유아세포의 MMP-3 생성에 미치는 영향을 조사하기 위한 것이다. 건강한 성인으로부터 치주질환이 이환되지않은 상악 제2대구치 후방의 건강한 치은결합 조직을 절취하여 치은섬유아세포를 배양한 후 다양한 농도의 metronidazole (10-$200{\mu}g/m{\ell}$) 및 doxycyline-HCl(10-$200{\mu}g/m{\ell}$)을 각각 적용하여 1시간 배양하고 proMMP-3의 활성화를 유도하기 위하여 25ng/ml의 IL-$1{\beta}$을 투여한 후 24시간 배양하여 배양된 세포의 상층 배양액을 추출하고 proMMP-3 ELISA kit를 이용하여 비색정량하였다. 비색정량을 통하여 얻어진 자료들은 독립 t-test와 일원분산분석(ANOVA) 및 사후검정으로 Duncan test를 시행하여 다음과 같은 결과를 얻었다. 1. Metronidazole 경우 10-$200{\mu}g/ml$의 모든 농도군에서 proMMP-3의 활성도가 억제되었다(p<0.05). 2. Doxycycline-HCl의 경우 $100{\mu}g/ml$ 이하의 농도군에서는 proMMP-3의 활성도가 억제되었으나(p<0.05), $200{\mu}g/ml$ 농도에서는 proMMP-3의 활성도가 상승되었다(p<0.05). 3. Metronidazole과 doxycycline-HCl의 대조군에 대한 각 실험농도군의 proMMP-3 생성의 감소비율 비교시 모든 농도군에서 metronidazole이 doxycycline-HCl보다 더 높은 감소율을 보였다. 이상과 같은 결과는 metronidazole(10-$200{\mu}g/ml$)이 doxycycline-HCl($100{\mu}g/ml$ 이하) 보다 더 광범위한 혈중농도에서 IL-$1{\beta}$의한 인체치은섬유아세포내 MMP-3의 활성도를 효과적으로 억제할 수 있음을 시사하였다.

• Journal of Periodontal and Implant Science
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• 제27권4호
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• pp.701-722
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• 1997

It was reported that low dose doxycycline(LDD) regimen could inhibit pathologically elevated collagenase activity in the gingival crevicular fluid of petients with adult periodontitis without producing typical antibiotic side effects. The purpose of this study was to evaluate the effects of LDD regimen(20mg) administered during non-surgical therapy on clinical index and gingival crevicular fluid enzyme activity in diabetics who are at high risk for periodontal disease. Forty-nine subjects having at least two sites with probing pocket depths greater than 4mm were selected. In this double-blind, placebo-controlled study, the patients were administered 20 mg doxycycline capsule or placebo capsule b.i.d. for 2 weeks. Clinical parameters of dental plaque, gingival inflammation, probing pocket depth and probing attachment level were assessed at week 0, 2, 4, and 8. Gingival crevicular fluid samples were collected at the same time to evaluate the activities of collagenase and elastase. Clinical parameters and elastase activity were significantly reduced in all groups compared to the baseline value after treatment. Significantly greater reduction in pocket depth and gain in attachment level was shown in the LDD-administered group compared to placebo group in both adult periodontitis and diabetic patients. Total collagenase activity was also reduced significantly in all groups after treatment, but the greater reduction was seen in the LDD-administered diabetics group compared to relevant placebo group(at 4, 8week). Significantly greater reduction in active collagenase activity was also seen in the LDD-administered group compared to placebo group in diabetic patients(at 2, 4, 8week). These results indicated that use of low dose doxycycline could be aueseful adjunct to instrumentation therapy in the management of diabetic patient with periodontitis as well as adult periodontitis patient.