• Title/Summary/Keyword: Pasteur

검색결과 122건 처리시간 0.041초

Evaluation of polyglycolic acid as an animal-free biomaterial for three-dimensional culture of human endometrial cells

  • Sadegh Amiri;Zohreh Bagher;Azadeh Akbari Sene;Reza Aflatoonian;Mehdi Mehdizadeh;Peiman Broki Milan;Leila Ghazizadeh;Mahnaz Ashrafi;FatemehSadat Amjadi
    • Clinical and Experimental Reproductive Medicine
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    • 제49권4호
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    • pp.259-269
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    • 2022
  • Objective: Animal-free scaffolds have emerged as a potential foundation for consistent, chemically defined, and low-cost materials. Because of its good potential for high biocompatibility with reproductive tissues and well-characterized scaffold design, we investigated whether polyglycolic acid (PGA) could be used as an animal-free scaffold instead of natural fibrin-agarose, which has been used successfully for three-dimensional human endometrial cell culture. Methods: Isolated primary endometrial cells was cultured on fibrin-agarose and PGA polymers and evaluated various design parameters, such as scaffold porosity and mean fiber diameter. Cytotoxicity, scanning electron microscopy (SEM), and immunostaining experiments were conducted to examine cell activity on fabricated scaffolds. Results: The MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay and SEM results showed that endometrial cells grew and proliferated on both scaffolds. Immunostaining showed cytokeratin and vimentin expression in seeded cells after 7 days of culture. On both scaffolds, an epithelial arrangement of cultured cells was found on the top layer and stromal arrangement matrix on the bottom layer of the scaffolds. Therefore, fibrin-agarose and PGA scaffolds successfully mimicked the human endometrium in a way suitable for in vitro analysis. Conclusion: Both fibrin-agarose and PGA scaffolds could be used to simulate endometrial structures. However, because of environmental and ethical concerns and the low cost of synthetic polymers, we recommend using PGA as a synthetic polymer for scaffolding in research instead of natural biomaterials.

Bioinformatics Study and Experimental Evaluation of miR-182, and miR-34 Expression Profiles in Tuberculosis and Lung Cancer

  • Leila Alimardanian;Bahram Mohammad Soltani;Shiva Irani;Mojgan Sheikhpour
    • Tuberculosis and Respiratory Diseases
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    • 제87권3호
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    • pp.398-408
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    • 2024
  • Background: Lung cancer is one of the most dangerous cancers and tuberculosis is one of the deadliest infectious diseases in the world. Many studies have confirmed the connection between lung cancer and tuberculosis, and also the microRNAs (miRNAs) that play a major role in the development of these two diseases. This study aims to use different databases to find effective miRNAs and their role in different genes in lung and tuberculosis diseases. It also aims to determine the role of miR-34a and miR-182 in lung cancer and tuberculosis. Methods: Using the Gene Expression Omnibus (GEO) database, the influential miRNA databases were studied in the two diseases. Finally, considering bioinformatics results and literature studies, two miR-34a and miR-182 were selected. The role of these miRNAs and their target genes was carefully evaluated using bioinformatics. The expression of miRNAs in the plasma of patients with lung cancer and tuberculosis and healthy individuals was investigated. Results: According to the GEO database, miR-34a and miR-182 are miRNAs that affect tuberculosis and lung cancer. By checking the miRBase, miRcode, DIANA, miRDB, galaxy, Kyoto Encyclopedia of Genes and Genomes databases, the role of these miRNAs on genes and different molecular pathways and their effect on these miRNAs were mentioned. The results of the present study showed that the expression of miR-34a and miR-182 was lower than that of healthy people. The p-value for miR-182 was <0.0001 and for miR-34a was 0.3380. Conclusion: Reducing the expression pattern of these miRNAs indicates their role in lung cancer and tuberculosis occurrence. Therefore, these miRNAs can be used as a biomarker for prognosis, diagnosis, and treatment methods.

Phycocyanin alleviates alcohol-induced testicular injury in male Wistar rats

  • Oumayma Boukari;Soumaya Ghoghbane;Wahid Khemissi;Thalja Lassili;Olfa Tebourbi;Khemais Ben Rhouma;Mohsen Sakly;Dorsaf Hallegue
    • Clinical and Experimental Reproductive Medicine
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    • 제51권2호
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    • pp.102-111
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    • 2024
  • Objective: Given the noteworthy implications of alcohol consumption and its association with male infertility, there has been a notable focus on investigating natural alternatives to mitigate its adverse effects. Thus, this study was conducted to assess the potential protective effect of phycocyanin extract derived from the blue algae Arthrospira (Spirulina) platensis against ethanol-induced oxidative stress, disturbances in testicular morphology, and alterations in sperm production. Methods: Male rats were divided into four groups (five rats each): the control group received a saline solution, the ethanol exposed group (EtOH) was subjected to intraperitoneal injections of 10 mL/kg of ethanol solution at a concentration of 38% (v/v), the phycocyanin alone treated group (P) received oral administration of phycocyanin at a dosage of 50 mg/kg, and the phycocyanin-cotreated group (PE) was given oral phycocyanin followed by ethanol injections. All treatments were administered over a period of 14 days. Results: Our findings demonstrated that ethanol exposure induced reproductive toxicity, characterized by reduced sperm production and viability, alterations in testicular weight and morphology, increased lipid peroxidation levels, and elevated oxidative enzyme activity. In addition, the ethanol-intoxicated group showed perturbations in serum biochemical parameters. However, the simultaneous exposure to ethanol and phycocyanin exhibited a counteractive effect against ethanol toxicity. Conclusion: The results showed that supplementation of phycocyanin prevented oxidative and testicular morphological damage-induced by ethanol and maintained normal sperm production, and viability.

BCG 접종 후 국소 림프절염의 임상양상 (The Clinical Aspects of Regional Lymphadenitis following BCG Vaccination)

  • 배선영;박양준;김종현;오진희;고대균;강진한
    • Pediatric Infection and Vaccine
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    • 제13권2호
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    • pp.137-146
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    • 2006
  • 목 적 : BCG 접종 후 가장 흔하게 발생하는 이상 반응인 국소 림프절염이 동반된 소아들을 대상으로 이들이 접종받은 BCG 균주의 비율, 림프절 크기에 따른 화농화 빈도, 약물치료 여부에 따른 임상 경과를 조사하여 이에 대한 발생 요인을 찾고, 치료방향을 설정하는데 도움이 되고자 본 연구를 시도하였다. 방 법 : 1997년부터 6년의 기간동안 가톨릭대학교 성빈센트병원 소아과 외래에 내원한 환아 중 BCG 접종 후에 발생한 국소 림프절염으로 진단된 생후 24개월 미만의 영유아 52명을 대상으로 하였다. BCG 균주의 종류, 접종 장소, 림프절염의 위치와 크기를 의무기록을 통하여 후향적으로 확인하였고, BCG 균주, 림프절염의 크기, 자연 치유율 및 화농화간의 상관관계를 조사하였다. 결 과 : BCG 접종 후 국소 림프절염의 첫 발견시기의 연령은 평균 5.5개월이었으며, 내원시의 림프절 크기가 클수록 첫 발견시기의 연령이 어렸고, 발생부위는 BCG를 접종한 같은 쪽의 겨드랑 부위가 가장 흔하였다. 대상군 52례 중 Pasteur 균주를 피내 접종한 군이 46례(88.5%)로 대부분을 차지하였고, Tokyo 균주를 경피 다천자법으로 접종한 군은 5례(9.6%)이었다. 이 중 28례(53.8%)는 자연 치유되었고 24례(46.2%)는 화농되었는데 림프절의 크기가 클수록 화농 빈도는 의미있게 높았으나, 균주에 따른 차이는 없었다. 약물치료는 화농 예방에 효과가 없었으며 치유기간을 단축시키지도 못했다. 결 론 : BCG 후의 림프절염의 발생은 균주와 접종방법에 따른 차이가 있는 것으로 예측된다. 약물치료는 효과가 없었으므로 권장되지 않으며 특히 비화농성인 경우는 자연히 소실될 수도 있기에 치료없이 관찰만이 요구된다. 이상적인 BCG는 접종 후 반흔을 남기고, 결핵 피부반응검사에 영향을 덜미치면서 이상반응이 적게 나타나며 저렴한 것이다. 이러한 조건을 가장 많이 충족시키는 BCG 균주를 선택하여 사용하는 노력이 필요하다 하겠다.

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선천성 보체 7번 결핍을 가진 한국인 한 가족 (A Korean familial case of hereditary complement 7 deficiency)

  • 김문규;이경열;이준화
    • Clinical and Experimental Pediatrics
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    • 제52권6호
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    • pp.721-724
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    • 2009
  • 수막구균(Meningococcus) 질환은 보체계의 이상과 관련이 있을 수 있다. 보체 7번은 5개의 말단 보체 단백질(terminal complement protein) 중 하나로 이것이 결핍되면 보체의 세포를 용해하는 작용을 잃게 되어 반복적인 감염, 특히 수막구균 감염에 대한 감수성이 증가한다. 2003년 9월 고열, 하지 동통, 두통과 점상 출혈로 외래에 내원한 11세 된 여자 환자가 입원 후 급격히 혼수 상태로 빠졌으나 즉각적인 치료로 결국 완전히 회복되었다. 환자의 최종 진단은 수막구균성 패혈증과 관절염이었다. 환자의 오빠도 비슷한 세균성 뇌수막염 가족력이 있어 저자들은 보체계 검사와 유전자 돌연변이(gene mutation)에 대해 분석하였고, 환자와 환자의 오빠는 보체 7번 유전자의 exon 4에 G394C에 돌연변이가 있는 선천성 보체 7번 결핍 환자였고, 아빠는 보인자로 밝혀졌다. 저자들은 예방적으로 4가 수막구균 백신(tetravalent polysaccharide meningococcal vaccine, $Menomune^{(R)}$ A/C/Y/W-135, Aventis Pasteur, Canada)을 3년마다 접종하기로 하였고 2004년 10월에 처음으로 접종하였다. 그러나 2006년 9월 오빠는 급성 세균성 뇌수막염(meningoencephalitis)으로 사망하였다. 이에 저자들은 2년마다 예방적 접종을 하기로 하였고, 환자는 2008년 9월에 3번째로 접종하였으며 16세 된 환자는 현재까지 건강한 상태이다. 저자들은 수막구균 감염과 보체 7번 유전자 네번째 intron의 3' 말단 splice acceptor 위치에 G to T 돌연변이(g.IVS4-1G> T)가 있는 선천성 보체 7번 결핍을 가진 한국인 한 가족을 보고하는 바이다.

결핵균 Adenylate Kinase 돌연변이 유전자와 Human Muscle-type Adenylate Kinase 합성 유전자를 형질전환한 BCG의 성장속도 변화 유무 조사 (Investigation of the Growth Rate Change in Recombinant BCG which was cloned Mycobacterium tuberculosis Adenylate Kinase Mutation Gene or Human Muscle-type Adenylate Kinase Synthetic Gene)

  • 이승헌;김효준;박영길;배길한
    • Tuberculosis and Respiratory Diseases
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    • 제60권2호
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    • pp.187-193
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    • 2006
  • 배 경 : 결핵균의 성장 속도가 늦은 이유가 mammalian cell이나 대장균에 비해 결핵균 AK의 매우 낮은 활성도에 의한 것이라는 추측으로부터 AK1과 유사한 촉매능을 나타내는 AKmt 돌연변이 유전자와 human muscle-type AK 합성 유전자(AK1)를 각각 Mycobacterium/E.coli 발현벡터에 재조합(pMVAKmtDM, pEMAK1)하여 성장 속도가 매우 느린 BCG에 형질전환함으로써 이들 단백질들의 촉매능에 의한 성장 속도 변화가 일어나는지를 확인하고자 하였다. 방 법 : Human AK1의 촉매 활성도와 유사하도록 결핵균 AK (AKmt)유전자의 ATPbd와 LID domain을 돌연변이하여 제조한 유전자(AKmtDM)와 human muscle-type adenylate kinase 합성 유전자(AK1)를 Mycobacterium/E.coli 발현벡터에 클로닝하여 재조합 BCG를 제조하였고, 이들 재조합 BCG와 BCG Pasteur $1173P_2$ (wild-type)를 7H9 액체배지에 접종하여 2-3 일 간격으로 $A_{600}$ 값을 측정하였다. 결 과 : 재조합 BCG의 성장 속도는 Wild-type BCG의 성장 속도에 비해 변화가 없었다. 결 론 : 결핵균 adenylate kinase의 정확한 기능은 알 수 없으나, adenylate kinase의 촉매 활성도의 증가는 BCG의 성장 속도에는 영향을 주지 않는 것으로 판단된다.

활성 건조 효모를 이용한 복분자주의 아미노산 함량 (Contents of Amino Acids in Raspberry Wine Using Active Dry Yeast Strains)

  • 문영자;이명순;성창근
    • 한국식품영양학회지
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    • 제19권4호
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    • pp.392-397
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    • 2006
  • 복분자주의 양조에 있어서 대표적인 활성 건조 효모 5종을 선정하여 실시한 복분자주의 아미노산 함량을 조사한 결과는 다음과 같다. RCM 발효주의 17가지 아미노산 총량은 Prise de Mousse 균주로 발효된 복분자주가 $16.77mg/{\ell}$로 제일 많았으며, Lalvin W15 균주로 발효된 복분자주가 $12.29mg/{\ell}$로 제일 적었다. Montrachet 균주로 발효된 RCB 발효주의 아미노산 총량은 $90.55mg/{\ell}$로 RCM 발효주의 $16.54mg/{\ell}$보다 약 5.5배 많았다. 시스틴과 이소루신은 RCM 발효주 중에서는 검출되지 않았고, RCB 발효주에서의 함량은 $2.97mg/{\ell}$$0.34mg/{\ell}$이었다. 알라닌, 아스파르트산, 세린의 함량은 RCM 발효주에서 보다 RCB 발효주에서 약 $14{\sim}20$배정도 많았으나, 프롤린 함량은 RCB 발효주가 RCM 발효주보다 비교적 적거나 조금 많았지만 그다지 차이가 크지 않았다.

알루미늄 화합물이 흰쥐의 혈청 효소 활성도에 미치는 영향 (Effects of Aluminum Compounds on Enzyme Activities in the Serum of Rat)

  • 김중만;백승화;한성희;신용서;윤태헌
    • 한국식품과학회지
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    • 제28권5호
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    • pp.801-805
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    • 1996
  • 알루미늄 화합물이 흰쥐의 효소활성에 미치는 영향을 알아보고자 흰쥐(Sprague-Dawley계 male) 75마리를 5개 그룹 즉, 대조군, $250\;ppm\;AlCl_3\;500\;ppm\;AlCl_3,\;250\;ppm\;Al_2(SO_4)_3,\;500\;ppm\;Al_2(SO_4)_3$로 나누어 2주동안 투여하여 asparate amino transaminase, alanine amino transminase, lactate dehydrogenase, 그리고 cholinesterase의 변화를 조사하였다. 체중은 대조군에 비하여 $Al_2(SO_4)_3$ 투여군은 2.82-6.16% 증가한 반면에 $AlCl_3$ 투여군에서는 0.53-3.35%로 감소하였다. 효소활성은 대조군에 비하여 $AlCl_3$ 또는 $Al_2(SO_4)_3$ 투여후에 AST는 0.68-9.97%, 21.04-24.79%, LDH는 29.43-57.56%, 74.60-29.33% 증가하였으나, ALT는 12.69-25.42%, 24.32-39.62%로 각각 감소하였다. ChE는 대조군에 비하여 $Al_{2}(SO_4)_3$ 투여군은 28.0-12.73% 증가하였으나 $Al_2(SO_4)_3$ 투여군은 3.93-14.48% 감소하였다.

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Type-Specific Human Papillomavirus Distribution in Invasive Squamous Cervical Carcinomas in Tunisia and Vaccine Impact

  • Ennaifer, Emna;Salhi, Faten;Laassili, Thalja;Fehri, Emna;Alaya, Nissaf Ben;Guizani, Ikram;Boubaker, Samir
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권15호
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    • pp.6769-6772
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    • 2015
  • Background: High risk human papillomaviruses (HPVs) are the leading cause of cervical cancer (CC) and Pap smear screening has not been successful in preventing CC in Tunisia. HPV vaccination that targets HPV16 and 18 offers a new efficient prevention tool. Identification of HPV types in CC is thus essential to determine the impact of HPV vaccine implementation. The aim of this study is to provide specific data from Tunisia. Materials and Methods: A total of 89 histological confirmed paraffin embedded samples isolated from patients with CC diagnosed between 2001 and 2011 were collected from five medical centres from Northern and Southern Tunisia. HPV DNA was detected using a nested PCR (MY09/MY11-GP5+/GP6+) and genotyping was assessed using a reverse blot line hybridisation assay that enables the detection of 32 HPV types. Results: HPV DNA was detected in all samples. Twelve high risk types were detected; HPV16 and/or 18 were predominant, accounting together for 92.1% of all the CC cases (HPV16: 83.1%). Single infections accounted for 48.8% of the cases and were mostly linked to HPV 16 (32.6%) and less frequently to HPV 18 (2.4%). The other high risk HPV single infections were linked to HPV 35 (4.6%), 45 (4.6%), 58 (2.3%) and 59 (2.3%). Multiple infections with mixing of 2 to 4 genotypes predominately featrued HPV16 and/or 18 with HPV 35 and 45 (96.6 %) and less frequently with HPV 59, 40, 66, 73 and 58. There was no statistically significant variation in the relative distribution of HPV types with age. Conclusions: These results strongly indicate that prophylactic HPV vaccines can have a major impact in preventing CC in Tunisia.

Inhibitory Effects of β-Cyclodextrin-Helenalin Complexes on H-TERT Gene Expression in the T47D Breast Cancer Cell Line - Results of Real Time Quantitative PCR

  • Ghasemali, Samaneh;Nejati-Koshki, Kazem;Akbarzadeh, Abolfazl;Tafsiri, Elham;Zarghami, Nosratollah;Rahmati-Yamchi, Mohamad;Alizadeh, Effat;Barkhordari, Amin;Tozihi, Majid;Kordi, Shirafkan
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권11호
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    • pp.6949-6953
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    • 2013
  • Background: Nowadays, the encapsulation of cytotoxic chemotherapeutic agents is attracting interest as a method for drug delivery. We hypothesized that the efficiency of helenalin might be maximized by encapsulation in ${\beta}$-cyclodextrin nanoparticles. Helenalin, with a hydrophobic structure obtained from flowers of Arnica chamissonis and Arnica Montana, has anti-cancer and anti-inflammatory activity but low water solubility and bioavailability. ${\beta}$-Cyclodextrin (${\beta}$-CD) is a cyclic oligosaccharide comprising seven D-glucopyranoside units, linked through 1,4-glycosidic bonds. Materials and Methods: To test our hypothesis, we prepared ${\beta}$-cyclodextrin-helenalin complexes to determine their inhibitory effects on telomerase gene expression by real-time polymerase chain reaction (q-PCR) and cytotoxic effects by colorimetric cell viability (MTT) assay. Results: MTT assay showed that not only ${\beta}$-cyclodextrin has no cytotoxic effect on its own but also it demonstrated that ${\beta}$-cyclodextrin-helenalin complexes inhibited the growth of the T47D breast cancer cell line in a time and dose-dependent manner. Our q-PCR results showed that the expression of telomerase gene was effectively reduced as the concentration of ${\beta}$-cyclodextrin-helenalin complexes increased. Conclusions: ${\beta}$-Cyclodextrin-helenalin complexes exerted cytotoxic effects on T47D cells through down-regulation of telomerase expression and by enhancing Helenalin uptake by cells. Therefore, ${\beta}$-cyclodextrin could be superior carrier for this kind of hydrophobic agent.