Displaying publications 1 - 20 of 62 in total

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  1. Al-Zergani F, Ronit A, Theilgaard ZP, Ronayne A, Nielsen HV, Porskrog A
    Ugeskr Laeger, 2023 Oct 02;185(40).
    PMID: 37873999
    Scrub typhus is caused by the mite-borne bacterium Orientia tsutsugamushi. Imported cases have been suspected in Denmark but no diagnostic method has yet been available to confirm the diagnosis. This is a case report of a 38-year-old male admitted to hospital with high fever, severe malaise and headache after returning from Malaysia. Scrub typhus was suspected and the patient recovered after one week of doxycycline treatment. The pathogen was identified by use of microbiome 16S/18S rRNA next-generation sequencing on ethylenediamine tetraacetic acid (EDTA) blood, which in the future may serve an important role in the investigation of travel-associated infections.
    Matched MeSH terms: Doxycycline/therapeutic use
  2. Saunders JP
    Malays J Pathol, 1979 Aug;2:7-9.
    PMID: 263425
    Matched MeSH terms: Doxycycline/therapeutic use
  3. Çetin HS, Ekici O, Küçükyildiz F, Senlik B
    Trop Biomed, 2021 Jun 01;38(2):149-158.
    PMID: 34172704 DOI: 10.47665/tb.38.2.050
    This study was planned to determine the efficacy of doxycycline and oxytetracycline in the treatment of feline Mycoplasma spp. infections and to analyze risk factors as well as clinical and haematological findings. Cats accepted to the clinic with complaints such as weakness, loss of appetite and fever were routinely examined. Clinical history of animal was demanded from the owner. An interview and a short questionnaire were conducted to owner to evaluate the risk factors associated with possible Mycoplasma status of animal. During the interview, the age, sex, breed, housing, flea infestation, worm control, external parasite control, other accompanying infections and vaccination status of cats were asked and the data recorded. Peripheral blood smears were stained with the DIFF-QUICK. Fifty positive cats were included in the study, 16 of which were treated with doxycycline (orally, 5 mg/kg twice a day) while other 34 with oxytetracycline (intramuscular injection, 10 mg/kg once a day). It was determined that all (100%) cats with Mycoplasma spp. infection had a flea infestation. Majority of cats (94%) did not receive the regular antiparasitic application and only 6 (12%) of them had complete vaccinations. Mycoplasma spp. infection was associated with younger age and outdoor access. Among the feline breed, striped cat (74%) was more prone to infection. The most common clinical signs encountered in cats were weakness (94%) and anorexia (84%). Haematological parameters revealed thrombocytopenia (86%), and anaemia (40%) in infected cats. At the end of the treatment, recovery rates for doxycycline and oxytetracycline groups were 87.5% and 67.6%, respectively. General status of these cats indicated significant improvement on the 4th day of treatment, and clinical symptoms are restored on the th day. Mycoplasmosis is an important infection for cats having anaemia, thrombocytopenia and leukocytosis. Flea infestations are risk factor for contamination of the disease. Based on our results, we recommend doxycycline treatment (5 mg/kg) for up to 21 days for elimination of Mycoplasma spp. in the blood of infected cats.
    Matched MeSH terms: Doxycycline/therapeutic use*
  4. Al Sulaiman K, Aljuhani O, Korayem GB, Alnajjar LI, Altebainawi AF, AlFaifi M, et al.
    Clin Appl Thromb Hemost, 2023;29:10760296231177017.
    PMID: 37322869 DOI: 10.1177/10760296231177017
    Doxycycline has revealed potential effects in animal studies to prevent thrombosis and reduce mortality. However, less is known about its antithrombotic role in patients with COVID-19. Our study aimed to evaluate doxycycline's impact on clinical outcomes in critically ill patients with COVID-19. A multicenter retrospective cohort study was conducted between March 1, 2020, and July 31, 2021. Patients who received doxycycline in intensive care units (ICUs) were compared to patients who did not (control). The primary outcome was the composite thrombotic events. The secondary outcomes were 30-day and in-hospital mortality, length of stay, ventilator-free days, and complications during ICU stay. Propensity score (PS) matching was used based on the selected criteria. Logistic, negative binomial, and Cox proportional hazards regression analyses were used as appropriate. After PS (1:3) matching, 664 patients (doxycycline n = 166, control n = 498) were included. The number of thromboembolic events was lower in the doxycycline group (OR: 0.54; 95% CI: 0.26-1.08; P = .08); however, it failed to reach to a statistical significance. Moreover, D-dimer levels and 30-day mortality were lower in the doxycycline group (beta coefficient [95% CI]: -0.22 [-0.46, 0.03; P = .08]; HR: 0.73; 95% CI: 0.52-1.00; P = .05, respectively). In addition, patients who received doxycycline had significantly lower odds of bacterial/fungal pneumonia (OR: 0.65; 95% CI: 0.44-0.94; P = .02). The use of doxycycline as adjunctive therapy in critically ill patients with COVID-19 might may be a desirable therapeutic option for thrombosis reduction and survival benefits.
    Matched MeSH terms: Doxycycline/therapeutic use
  5. Norazah A, Mazlah A, Cheong YM, Kamel AG
    Med J Malaysia, 1995 Jun;50(2):177-9.
    PMID: 7565191
    A 34-year-old laboratory worker developed murine typhus after an accidental splashing of Rickettsia typhi over her right eye and lips. Indirect immunoperoxidase test showed a four-fold increase in titre to Rickettsia typhi. She responded well to doxycycline.
    Matched MeSH terms: Doxycycline/therapeutic use
  6. Rahman MT
    J Herb Med, 2020 Oct;23:100382.
    PMID: 32834942 DOI: 10.1016/j.hermed.2020.100382
    An effective vaccine to prevent the SARS-CoV-2 causing COVID-19 is yet to be approved. Further there is no drug that is specific to treat COVID-19. A number of antiviral drugs such as Ribavirin, Remdesivir, Lopinavir/ritonavir, Azithromycin and Doxycycline have been recommended or are being used to treat COVID-19 patients. In addition to these drugs, rationale and evidence have been presented to use chloroquine to treat COVID-19, arguably with certain precautions and criticism. In line with the proposed use of chloroquine, Nigella sativa (black seed) could be considered as a natural substitute that contains a number of bioactive components such as thymoquinone, dithymoquinone, thymohydroquinone, and nigellimine. Further benefits to use N. sativa could be augmented by Zn supplement. Notably, Zn has been proven to improve innate and adaptive immunity in the course of any infection, be it by pathogenic virus or bacteria. The effectiveness of the Zn salt supplement could also be enhanced with N. sativa as its major bioactive component might work as ionophore to allow Zn2+ to enter pneumocytes - the target cell for SARSCoV-2. Given those benefits, this review paper describes how N. sativa in combination with Zn could be useful as a complement to COVID-19 treatment.
    Matched MeSH terms: Doxycycline
  7. Pathak M, Coombes AGA, Turner MS, Palmer C, Wang D, Steadman KJ
    J Pharm Sci, 2015 Dec;104(12):4217-4222.
    PMID: 26398713 DOI: 10.1002/jps.24652
    Polycaprolactone (PCL) matrices loaded with doxycycline were produced by rapidly cooling suspensions of the drug powder in PCL solution in acetone. Drug loadings of 5%, 10%, and 15% (w/w) of the PCL content were achieved. Exposure of doxycycline powder to matrix processing conditions in the absence of PCL revealed an endothermic peak at 65°C with the main peak at 167°C, suggesting solvatomorph formation. Rapid "burst release" of 24%-32% was measured within 24 h when matrices were immersed in simulated vaginal fluid (SVF) at 37°C, because of the presence of drug at or close to the matrix surface, which is further confirmed by scanning electron microscopy. Gradual release of 66%-76% of the drug content occurred over the following 14 days. SVF containing doxycycline released from drug-loaded PCL matrices retained 81%-90% antimicrobial activity compared with the nonformulated drug. The concentrations of doxycycline predicted to be released into vaginal fluid from a PCL matrix in the form of an intravaginal ring would be sufficient to kill Neisseria gonorrhoea and many other pathogens. These results indicate that PCL may be a suitable polymer for controlled intravaginal delivery of doxycycline for the treatment of sexually transmitted infections.
    Matched MeSH terms: Doxycycline/pharmacology; Doxycycline/chemistry*
  8. Ponnampalam JT
    Trans R Soc Trop Med Hyg, 1981;75(3):372-7.
    PMID: 7034311
    Doxycycline in a single dose was found to be a valuable drug in the treatment of chloroquine-resistant falciparum malaria. It was less effective in a single daily dose of 4 mg/kg body-weight for four days, when it cured only five out of nine patients, while a dosage of 4 mg/kg body-weight for seven days cured 23 out of 26 patients.
    Matched MeSH terms: Doxycycline/administration & dosage; Doxycycline/therapeutic use*
  9. Ng A
    Med J Malaysia, 1975 Dec;30(2):133-4.
    PMID: 1241709
    Matched MeSH terms: Doxycycline/administration & dosage; Doxycycline/therapeutic use*
  10. Yap KCH, Pulikkotil SJ
    BMC Oral Health, 2019 09 05;19(1):209.
    PMID: 31488125 DOI: 10.1186/s12903-019-0873-7
    BACKGROUND: To compare the effectiveness of systemic doxycycline as an adjunct to scaling and root planing (SRP) with SRP alone in improving periodontal clinical attachment level and glycemic control in diabetic patients with periodontitis.

    METHODS: Two independent reviewers (KY and SJ) screened two electronic databases, PubMed and Scopus, for randomized clinical trials on the use of systemic doxycycline as an adjunct to scaling and root planing in improving periodontal status and glycemic control in diabetic patients with periodontitis using predetermined selection criteria within a 3-month period. The reviewers independently did data screening, data selection, data extraction and risk of bias. Quality of studies involved was analysed using the revised Cochrane Risk of Bias 2.0. Weighted standard mean differences (SMD) and 95% confidence intervals were calculated using a random effects meta-analysis model. Publication bias was evaluated using funnel plot. Quality of evidence was evaluated by Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach.

    RESULTS: Electronic searches provided 1358 records and six studies were selected. The meta-analyses indicated that there was no statistically significant difference in the improvement of periodontal status with the use of systemic doxycycline as an adjunct for scaling and root planing (SRP). SMD of clinical attachment levels (- 0.22 [- 0.52, 0.08]) and HbA1c levels (- 0.13 [- 0.41, 0.15]) were calculated. Overall risk of bias is high in 2 out of 6 studies involved.

    CONCLUSION: Systemic doxycycline when used in addition to scaling and root planing yields no significant improvement of clinical attachment levels for periodontal status and reduction of HbA1c levels in treatment of diabetic patients with periodontitis when comparing the test group to the control group.

    Matched MeSH terms: Doxycycline/administration & dosage; Doxycycline/therapeutic use*
  11. Tan SL, Neoh CY, Tan HH
    Singapore Med J, 2012 Feb;53(2):e24-7.
    PMID: 22337196
    Rhinoscleroma is a chronic, slowly progressive, inflammatory disease of the upper respiratory tract. It is associated with Klebsiella rhinoscleromatis infection. We present the clinical and pathological features of four patients diagnosed with rhinoscleroma at the National Skin Centre, Singapore between 1997 and 2010. All four patients presented with only cutaneous involvement, and the diagnosis was clinched via histological examination. The patients were treated with a combination of antibiotics. Two patients who were on follow-up at the time of this writing responded positively to the antibiotic treatment, while two were lost to follow-up. Rhinoscleroma is a diagnostic challenge, as it is an uncommon disease in Singapore and Malaysia. We highlight this condition to raise awareness of the disease in order to aid in early diagnosis of patients. Without treatment, this condition can result in significant complications, including involvement of the lower airways. Early diagnosis and appropriate treatment help to reduce morbidity.
    Matched MeSH terms: Doxycycline/administration & dosage; Doxycycline/therapeutic use
  12. Tan OL, Safii SH, Razali M
    Pharmaceutics, 2020 Nov 12;12(11).
    PMID: 33198248 DOI: 10.3390/pharmaceutics12111086
    This review aimed to rank the clinical efficacy of commercially available single-application local drug delivery and adjunctive agents (LDAs) compared with subgingival mechanical debridement (SMD) in nonsurgical periodontal therapy (NSPT). Randomized controlled clinical trials that compared LDAs against SMD alone or with placebo in adults (aged at least 18 years) diagnosed with periodontitis with a minimum of 6 months follow-up were included. A frequentist approach to random-effects network meta-analysis was implemented. The efficacies of the LDAs measured by probing pocket depth (PPD) reduction and clinical attachment level (CAL) gain were reported as mean difference (MD) with 95% confidence intervals (CIs). The treatments were ranked according to their P-score. Four network meta-analyses suggested that sulfonic/sulfuric acid gel (PPD MD -1.13 mm, 95% CI -1.74 to -0.53, P-score 0.91; CAL MD -1.09 mm, 95% CI -1.58 to -0.61, P-score 0.95) and doxycycline hyclate gel (PPD MD -0.90 mm, 95% CI -1.50 to -0.30, P-score 0.93; CAL MD -0.84 mm, 95% CI -1.40 to -0.28, P-score 0.92) were the most effective in reducing PPD and gaining CAL in split-mouth and parallel studies, respectively (moderate certainty of evidence). LDAs have differing efficacies, but they present with possible clinical significance over SMD alone in NSPT.
    Matched MeSH terms: Doxycycline
  13. Goh SW, Adawiyah J, Md Nor N, Yap F, Ch'ng P, Chang CC
    Malays Fam Physician, 2019;14(1):42-46.
    PMID: 31289632
    Prurigo pigmentosa is an inflammatory dermatosis characterized by a pruritic, symmetrically distributed erythematous papular or papulo-vesicular eruption on the trunk arranged in a reticulated pattern that resolves with hyperpigmentation. It is typically non-responsive to topical or systemic steroid therapy. The exact etiology is unknown, but it is more commonly described in the Far East countries. Dietary change is one of the predisposing factors. We report on nine young adult patients with prurigo pigmentosa, among whom five were on ketogenic diets prior to the onset of the eruptions. All cases resolved with oral doxycycline with no recurrence. We hope to improve the awareness of this uncommon skin condition among general practitioners and physicians so that disfiguring hyperpigmentation due to delayed diagnosis and treatment can be avoided.
    Matched MeSH terms: Doxycycline
  14. Nath S, Pulikkotil SJ, Dharmarajan L, Arunachalam M, Jing KT
    Dent Res J (Isfahan), 2020 08 14;17(4):235-243.
    PMID: 33282148
    Background: Scaling and root planing (SRP) for the treatment of periodontitis may be less effective in some patients. This study evaluated the effectiveness of local doxycycline as an adjunct to SRP among smokers with periodontitis compared to SRP alone in randomized controlled trials (RCTs).

    Materials and Methods: For this systematic review and meta-analysis, PubMed and Scopus databases were searched till November 2018 for English publications. RCTs that compared the effect of local doxycycline adjunct to SRP among smokers with periodontitis were selected. Patient characteristics, disease characteristics, and outcome data on clinical attachment level (CAL) and periodontal probing depth at 1, 3- and 6-month follow-up was extracted. Quality of selected studies was assessed by the revised Cochrane Risk of Bias 2.0 tool. Random effects model and trial sequential analysis were performed. GRADE approach was used to assess the quality of evidence. P > 0.05 was considered as statistically significant.

    Results: Five trials were included in the review. Local use of doxycycline as an adjunct to SRP was effective in gain of 1.1 mm (0.47-1.74, P = 0.091) in CAL at 6 months calculated from two studies. The evidence was of low quality, and at least a total of 866 patients are required for conclusiveness.

    Conclusion: Local doxycycline as an adjunct to SRP significantly improved clinical attachment in smokers with periodontitis and can be recommended. Studies are required with long-term follow-up and patient-related outcome data.

    Matched MeSH terms: Doxycycline
  15. Yong GY, Mohamed-Noor J, Ong PY, Suliman NB, Lim CW, Zahari M
    Eur J Ophthalmol, 2021 Feb 07.
    PMID: 33550831 DOI: 10.1177/1120672121992953
    PURPOSE: To report the clinical profile and effectiveness of oral doxycycline as a non-invasive treatment for glaucoma filtering surgery complications.

    METHOD: Prospective case series.

    RESULTS: Doxycycline is widely used in treating corneal melts, ocular surface diseases, meibomian gland disease, recurrent epithelial cell erosion, rosacea, and keratitis sicca. This prospective case series highlights the successful treatment of five patients with leaking blebs and conjunctiva erosion from glaucoma filtration surgery with the use of oral doxycycline. There was no adverse event reported in our cases.

    CONCLUSIONS: This study suggests that oral doxycycline may be a feasible non-surgical treatment modality due to its ability to inhibit collagenolysis, restore the Meibomian gland function, thereby stopping breakdown and promote conjunctival tissue healing.

    Matched MeSH terms: Doxycycline
  16. Rothan HA, Mohamed Z, Paydar M, Rahman NA, Yusof R
    Arch Virol, 2014 Apr;159(4):711-8.
    PMID: 24142271 DOI: 10.1007/s00705-013-1880-7
    Doxycycline is an antibiotic derived from tetracycline that possesses antimicrobial and anti-inflammatory activities. Antiviral activity of doxycycline against dengue virus has been reported previously; however, its anti-dengue properties need further investigation. This study was conducted to determine the potential activity of doxycycline against dengue virus replication in vitro. Doxycycline inhibited the dengue virus serine protease (DENV2 NS2B-NS3pro) with an IC50 value of 52.3 ± 6.2 μM at 37 °C (normal human temperature) and 26.7 ± 5.3 μM at 40 °C (high fever temperature). The antiviral activity of doxycycline was first tested at different concentrations against DENV2 using a plaque-formation assay. The virus titter decreased significantly after applying doxycycline at levels lower than its 50 % cytotoxic concentration (CC50, 100 μM), showing concentration-dependent inhibition with a 50 % effective concentration (EC50) of approximately 50 μM. Doxycycline significantly inhibited viral entry and post-infection replication of the four dengue serotypes, with serotype-specific inhibition (high activity against DENV2 and DENV4 compared to DENV1 and DENV3). Collectively, these findings underline the need for further experimental and clinical studies on doxycycline, utilizing its anti-dengue and anti-inflammatory activities to attenuate the clinical symptoms of dengue virus infection.
    Matched MeSH terms: Doxycycline/pharmacology*
  17. Bee PC, Chow SK, Tan LH
    Med J Malaysia, 2003 Dec;58(5):777-9.
    PMID: 15190670
    Pancytopaenia is a rare clinical presentation of severe leptospirosis. We would like to report a case of severe leptospirosis that progressed to pancytopaenia despite initial penicillin therapy. The patient needed a second course of antibiotic with doxycycline to improve his persistent symptoms and cytopaenia. Persistent pancytopaenia in severe leptospirosis and its management were reviewed.
    Matched MeSH terms: Doxycycline/administration & dosage
  18. Ganesan N, Embi N, Hasidah MS
    Trop Biomed, 2020 Jun 01;37(2):303-317.
    PMID: 33612800
    Burkholderia pseudomallei is the etiologic agent of melioidosis, a major cause of community-acquired pneumonia and sepsis in the endemic areas. The overall mortality of patients with severe melioidosis remains high due to severe sepsis attributed to overwhelming inflammatory cytokine response in spite of recommended antibiotic therapy. It is crucial that therapeutic approaches beyond just effective antibiotic treatment such as adjunct therapy be considered to mitigate the dysregulated inflammatory signaling and augment host defenses. In an acute B. pseudomallei infection model, we have previously demonstrated that treatment with anti-malarial drug, chloroquine, modulated inflammatory cytokine levels and increased animal survivability via Akt-mediated inhibition of glycogen synthase kinase-3β (GSK3β). GSK3β is a downstream effector molecule within the phosphatidylinositol 3-kinase (PI3K)/ Akt axis which plays a pivotal role in regulating the production of pro- and anti-inflammatory cytokines. Here we evaluate the effect of chloroquine treatment in combination with a subtherapeutic dose of the antibiotic doxycycline on animal survivability, cytokine levels and phosphorylation states of GSK3β (Ser9) in a murine model of acute melioidosis infection to investigate whether chloroquine could be used as an adjunct therapy along with doxycycline for the treatment of melioidosis. Our findings revealed that 50 mg/kg b.w. chloroquine treatment together with a dose of 20 mg/kg b.w. doxycycline improved survivability (100%) of mice infected with 3 X LD50 of B. pseudomallei and significantly (P<0.05) lowered the bacterial loads in spleen, liver and blood compared to controls. B. pseudomallei-infected mice subjected to adjunct treatment with chloroquine and doxycycline significantly (P<0.05) reduced serum levels of pro-inflammatory cytokines (TNF-α, IFN-γ and IL-6) but increased levels of antiinflammatory cytokines (IL-4 and IL-10). Western blot analysis demonstrated that the intensities of pGSK3β (Ser9) in liver samples from mice treated with chloroquine and doxycycline combination were significantly (P<0.05) higher suggesting that the adjunct treatment resulted in significant inhibition of GSK3β. Taken together the bacteriostatic action of doxycycline coupled with the cytokine-modulating effect of chloroquine gave full protection to B. pseudomallei-infected mice and involved inhibition of GSK3β. Findings from the present study using B. pseudomallei-infected BALB/c mice suggest that chloroquine is a plausible candidate for repurposing as adjunct therapy to treat acute B. pseudomallei infection.
    Matched MeSH terms: Doxycycline/therapeutic use
  19. Kantele A, Marti H, Felger I, Müller D, Jokiranta TS
    Emerg Infect Dis, 2008 Sep;14(9):1434-6.
    PMID: 18760013 DOI: 10.3201/eid1409.080170
    In 2007, a Finnish traveler was infected in Peninsular Malaysia with Plasmodium knowlesi, a parasite that usually causes malaria in monkeys. P. knowlesi has established itself as the fifth Plasmodium species that can cause human malaria. The disease is potentially life-threatening in humans; clinicians and laboratory personnel should become more aware of this pathogen in travelers.
    Matched MeSH terms: Doxycycline/therapeutic use
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