Screening for Antiviral Activity: MTT Assay

Author(s):  
Ramachandran Chelliah ◽  
Fazle Elahi ◽  
Deog-Hwan Oh
Keyword(s):  
Author(s):  
Noor Zarina Abd Wahab ◽  
Aziah Azizul ◽  
Nazlina Ibrahim

Background and Objectives: Catharanthus roseus is generally used to treat many diseases in folklore remedies. The present study is aimed at determining phytochemical constituents, cytotoxicity and antiviral activities for crude extract of the plant. Materials and Methods: The whole plant of C. roseus was extracted using methanol extraction method. Phytochemical qualitative screening was carried out for C. roseus extract according to standard procedures used to test for the presence of alkaloid, saponin, terpenoid and steroid. Cytotoxicity was assessed using 3-(4,5-dimethylthiazol-2,5-diphenyltetrazolium bromide (MTT) assay. Plaque reduction assays were carried out to evaluate the antiviral activity of C. roseus extract against herpes simplex virus type 1 (HSV-1). These include post-treatment, pre-treatment and virucidal assays. Results: C. roseus extract contain secondary metabolites such as alkaloid, saponin and terpenoid but does not contain steroid. Cytotoxicity screening against Vero cells using MTT assay showed that the CC50 values for crude extract of C. roseus was 0.5 mg/mL. The extract prepared from C. roseus possesses phytochemical compound that was non-cytotoxic to the cell with potential antiviral activity. Plaque reduction assays against herpes simplex virus type 1 (HSV-1) showed that the selective indices (SI = CC50 / EC50) of C. roseus extract in post-treatment, pre-treatment and virucidal assays were 36, 20 and 4.7 respectively. The results revealed that the extract prepared from C. roseus possesses phytochemical compound that was non-cytotoxic to the cell with potential antiviral activity. Conclusion: This study showed that C. roseus extract has promising potential to be explored as anti-HSV-1 agent regardless of the mode of treatment.


2009 ◽  
Vol 64 (7-8) ◽  
pp. 483-489 ◽  
Author(s):  
Aladdin M. Srour ◽  
Abd El-Hamid A. Ismail ◽  
Salah M. El-Kosy

The pyrimidine thione derivatives 2a - d were prepared by the reaction of thiourea, ethyl cyanoacetate and several aromatic aldehydes. The acyclic thioglycosides 4a - 7d were prepared by the reaction of the synthesized pyrimidine thiones 2a - d with different alkyl halides, whereas the reaction of 2a - d with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide afforded the cyclic thioglycosides 8a - d whose deprotection afforded 9a - d. The obtained compounds were tested for their antischistosomal and antiviral activity against hepatitis B virus (HBV). Compounds 5a, 5d, 7a showed high activity against HBV using the MTT assay; moreover compounds 5c, 6d, 7a, 9a, 9c exhibited high activity as antischistosomal agents.


Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
C Thaele ◽  
A Janecki ◽  
AF Kiderlen ◽  
H Kolodziej

2019 ◽  
Vol 45 (1) ◽  
Author(s):  
Graciella Regina ◽  
Sri Awalia Febriana ◽  
Yohanes Widodo Wirohadidjojo
Keyword(s):  
Ex Vivo ◽  

Pembedahan elektif selama fase bleeding siklus menstruasi sering dihindari terkait gangguan koagulasi. Salah satu hormon yang berhubungan dengan proses penyembuhan luka adalah estrogen. Kadar estrogen berfluktuasi sepanjang siklus menstruasi dan berada pada kadar terendah selama fase bleeding. Penelitian eksperimental ex vivo dilakukan pada 16 perempuan berusia 18–40 tahun yang memiliki siklus menstruasi teratur. Darah vena subjek diambil sebanyak 5ml pada fase bleeding dan ovulasi. Kemampuan penyembuhan luka dari masing-masing serum dinilai dengan mengukur proliferasi fibroblas dan deposisi kolagen fibroblas kulit. Ovulasi ditentukan dengan uji pakis saliva, kadar estradiol serum diukur menggunakan Cobas Elecsys®, proliferasi fibroblas menggunakan MTT assay, dan deposisi kolagen dengan sirius red. Hasil penelitian menunjukkan rerata kadar serum estradiol pada fase bleeding dan ovulasi berturut-turut adalah 29,6±10,5pg/dl dan 180,1±164,5pg/dl. Rerata indeks proliferasi fibroblas yang dipajankan pada fase bleeding dan ovulasi adalah 1,09±0,63 dan 1,44±0,66. Rerata densitas optik kolagen fibroblas yang terpajan serum fase bleeding dan ovulasi adalah 0,47±0,2 dan 0,54±0,14. Seluruhnya menunjukkan perbedaan yang bermakna secara statistik (p<0,05). Serum fase bleeding memiliki kemampuan penyembuhan luka yang lebih rendah dibandingkan dengan serum fase ovulasi. Kebijakan untuk tidak melakukan pembedahan elektif selama fase bleeding, selain terkait dengan gangguan pembekuan darah juga terkait dengan proses penyembuhan luka.Kata Kunci:  menstruasi, estradiol, ovulasi, proliferasi fibroblas, deposisi kolagen, penyembuhan luka


2016 ◽  
Author(s):  
Liubov Biliavska ◽  
Yulia Pankivska ◽  
Olga Povnitsa ◽  
Svitlana Zagorodnya ◽  
Ganna Gudz ◽  
...  

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