Antimicrobial activity of recombinant E. coli expressed chicken AvBD-2 and its mRNA expression in Indian native Aseel and Kadaknath chicken breeds

2017 ◽  
Author(s):  
T. R. Kannaki ◽  
M. R. Reddy ◽  
P. C. Verma
Keyword(s):  
Antimicrobial Activity ◽  
Mrna Expression ◽  
Affinity Column ◽  
White Leghorn ◽  
Coding Region ◽  
Recombinant Peptide ◽  
E Coli ◽  
Significant Difference ◽  
Chicken Breeds

Avian b defensins (AvBD) are antimicrobial peptides that play a crucial role in the innate immune response in chickens. In the present study, chicken AvBD2 gene was cloned, expressed in E. coli system and the in vitro antimicrobial activity of recombinant peptide was evaluated. The entire mature peptide region of chicken AvBD2 region was amplified and cloned in pUC29 cloning vector. Further, the coding region was sub cloned in pET-28A expression vector. After transformation in E. coli cells, the peptide synthesis was induced and recombinant protein (7.7 kDa) was purified by using Ni-NTA affinity column. The recombinant chicken AvBD2 showed antibacterial activity against S. Pullorum. The minimum bactericidal concentration (MBC) of recombinant chicken AvBD2 evaluated by micro-broth dilution assay was 35 µg/ ml. We also quantified the expression of AvBD2 transcript expression in day-old spleen tissue of Indian native chicken breeds (Aseel and Kadaknath) and White Leghorn. Measurable AvBD2 mRNA expression was found in the spleen of all three breeds. However, no significant difference was found in AvBD2 gene expression between native chickens and White Leghorn.

scholarly journals Phytochemical Screening, Mathematical Analysis and Antimicrobial Activity of Methanolic Seed Extract of Hunteria Umbellata

2020 ◽  
pp. 1-17
Author(s):  
Oluwaseun Raphael Aderele ◽  
Adekunle Kareem Rasaq ◽  
Johnson Oshiobugie Momoh
Keyword(s):  
Antimicrobial Activity ◽  
Seed Extract ◽  
T Test ◽  
Diffusion Method ◽  
Phytochemical Analysis ◽  
In Vitro Antimicrobial Activity ◽  
E Coli ◽  
Significant Difference ◽  
Agar Well Diffusion Method

Aim: The study evaluates the in-vitro antimicrobial activity of Hunteria umbellata against Escherichia coli, Staphylococcus aureus and Streptococcus sp. Place and Duration of Study: The study was carried out for three months in 2019 in Biochemistry Laboratory, Department of Chemical Sciences (Biochemistry unit), School of Pure and Applied Sciences, Lagos State Polytechnic, Ikorodu, Lagos- Nigeria. Methodology: The qualitative and GC-MS analysis of Hunteria umbellata methanolic seed extract were determined using standard procedure. The antimicrobial activity was evaluated by the disc diffusion method and agar well diffusion method. The experimental data was resampled 1000 times to allow for higher degrees of freedom in carrying out t-test to test for the difference of the effect of in-vitro antimicrobial activity of H. umbellata against E. coli, S. aureus and Streptococcus sp using mathematical software R language (3.6.1 version). Line plots, histogram and t-test are used to explain the effect of antimicrobial activity of H. umbellate on the selected bacteria. MIC and MBC were determined using standard methods. Results: The Phytochemical analysis of methanolic seed extract of Hunteria umbellata showed the presence of secondary metabolites like saponins, tannins, flavonoids, steroids, phenol among others. GC-MS assay of the H. umbellata seed extract revealed the presence of eight different compounds. Agar well diffusion method was characterized by inhibition zones of 18.36±0.87, 19.13±1.03 and 21.62±2.53 mm for E.coli, S. aureus and Streptococcus sp respectively at 300 mg/ml-1 and 21.70± 1.60, 23.83± 2.64 and 28.57± 1.52 for E.coli, S. aureus and Streptococcus sp respectively at 500 mg/ml. The results of the analysis show that there is a significant difference between the effects of in-vitro antimicrobial activity of H. umbellate on 3001 and 500 mg/ml on each bacteria tested at 5% level of significance. E.coli, S. aureus and Streptococcus sp were tested against 12 standard antimicrobial agents, of which six was sensitive and another six was resistance to E .coli, seven was sensitive, and five was resistance to S. aureus while four was resistance and eight sensitive to Streptococcus sp. The minimum inhibitory concentration (MIC) for E.coli, S. aureus, and  Streptococcus sp were 250, 125 and 31.25 mgml-1 while their minimum bactericidal concentration (MBC) were 500, 250 and 125 respectively. MIC and MBC tests showed that H. umbellata methanolic seed extract had noticeable bactericidal effects with MBC/MIC values ranging between 2 to 4. The extract has strong potency against these microorganisms with Streptococcus sp being the most susceptible. Conclusions: Hunteria umbellata has potential as natural therapeutic agents against E. coli, S. aureus and Streptococcus sp and they may prevent pathogenic diseases.

scholarly journals Identification of NURR1 (Exon 4) and FOXA1 (Exon 3) Haplotypes Associated with mRNA Expression Levels in Peripheral Blood Lymphocytes of Parkinson’s Patients in Small Indian Population

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Jayakrishna Tippabathani ◽  
Jayshree Nellore ◽  
Vaishnavie Radhakrishnan ◽  
Somashree Banik ◽  
Sonia Kapoor
Keyword(s):  
Mrna Expression ◽  
Peripheral Blood ◽  
Peripheral Blood Lymphocytes ◽  
Coding Region ◽  
Male And Female ◽  
Blood Lymphocytes ◽  
Coding Regions ◽  
Significant Difference ◽  
Exon 4 ◽  
Foxa1 Expression

Here, we study the expression of NURR1 and FOXA1 mRNA in peripheral blood lymphocytes and its haplotypes in coding region in a small Chennai population of India. Thirty cases of Parkinson’s patients (PD) with anti-PD medications (20 males aged65.85±1.19and 10 females aged65.7±1.202) and 30 age matched healthy people (20 males aged68.45±1.282and 10 females aged65.8±1.133) were included. The expression of NURR1 and FOXA1 in PBL was detected by Q-PCR and haplotypes were identified by PCR-SSCP. In the 30 PD cases examined, NURR1 and FOXA1 expression was significantly reduced in both male and female PD patients. However, NURR1 (57.631% reduced in males; 28.93% in females) and FOXA1 (64.42% in males; 55.76% in females) mRNA expression did differ greatly between male and female PD patients. Polymorphisms were identified at exon 4 of the NURR1 and at exon 3 of the FOXA1, respectively, in both male and female patients. A near significant difference in SSCP patterns between genders of control and PD population was analyzed suggesting that further investigations of more patients, more molecular markers, and coding regions should be performed. Such studies could potentially reveal peripheral molecular marker of early PD and different significance to the respective genders.

Activation of nuclear factor of activated T cells 5 in the peritoneal membrane of uremic patients

2015 ◽  
Vol 308 (11) ◽  
pp. F1247-F1258 ◽  
Author(s):  
Daniel Kitterer ◽  
Joerg Latus ◽  
Christoph Ulmer ◽  
Peter Fritz ◽  
Dagmar Biegger ◽  
...  
Keyword(s):  
T Cells ◽  
Mrna Expression ◽  
Mrna Levels ◽  
Nuclear Factor ◽  
Activated T Cells ◽  
Significant Difference ◽  
Ccl2 Mrna ◽  
Uremic Patients ◽  
High Concentrations

Peritoneal inflammation and fibrosis are responses to the uremic milieu and exposure to hyperosmolar dialysis fluids in patients on peritoneal dialysis. Cells respond to high osmolarity via the transcription factor nuclear factor of activated T cells (NFAT5). In the present study, the response of human peritoneal fibroblasts to glucose was analyzed in vitro. Expression levels of NFAT5 and chemokine (C-C motif) ligand (CCL2) mRNA were quantified in peritoneal biopsies of five nonuremic control patients, five uremic patients before PD (pPD), and eight patients on PD (oPD) using real-time PCR. Biopsies from 5 control patients, 25 pPD patients, and 25 oPD patients were investigated using immunohistochemistry to detect the expression of NFAT5, CCL2, NF-κB p50, NF-κB p65, and CD68. High glucose concentrations led to an early, dose-dependent induction of NFAT5 mRNA in human peritoneal fibroblasts. CCL2 mRNA expression was upregulated by high concentrations of glucose after 6 h, but, most notably, a concentration-dependent induction of CCL2 was present after 96 h. In human peritoneal biopsies, NFAT5 mRNA levels were increased in uremic patients compared with nonuremic control patients. No significant difference was found between the pPD group and oPD group. CCL2 mRNA expression was higher in the oPD group. Immunohistochemistry analysis was consistent with the results of mRNA analysis. CD68-positive cells were significantly increased in the oPD group. In conclusion, uremia results in NFAT5 induction, which might promote early changes of the peritoneum. Upregulation of NFAT5 in PD patients is associated with NFκB induction, potentially resulting in the recruitment of macrophages.

scholarly journals In vitro evaluation of the antimicrobial activity of five root canal sealers

2004 ◽  
Vol 15 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Brenda Paula Figueiredo de Almeida Gomes ◽  
José Assis Pedroso ◽  
Rogério Castilho Jacinto ◽  
Morgana Eli Vianna ◽  
Caio Cezar Randi Ferraz ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Properties ◽  
Contact Method ◽  
Streptococcus Sanguis ◽  
Actinomyces Naeslundii ◽  
Agar Diffusion Test ◽  
Significant Difference ◽  
Ah Plus ◽  
Endodontic Sealers

The aim of the present study was to analyze the antimicrobial properties of five endodontic sealers: Endo Fill, Endomethasone, Endomethasone N, Sealer 26 and AH-Plus, against the following microorganisms: Candida albicans, Staphylococcus aureus, Enterococcus faecalis, Streptococcus sanguis and Actinomyces naeslundii. The sealers were tested immediately, 24 h, 48 h and 7 days after manipulation.The direct contact method through the observation of the microbial growth in liquid medium and the agar diffusion test were used to evaluate the antimicrobial properties of the sealers. The results, in both methodologies used, showed that immediately after manipulation, Endo-Fill and Endomethasone demonstrated the highest antimicrobial activity, with no statistically significant difference between them. Sealer 26 demonstrated the lowest antimicrobial activity. At all other times after manipulation, there were no statistically significant differences among all the sealers tested. In conclusion, none of the sealers totally inhibited the growth of the microorganisms. Furthermore, the antimicrobial activity of each sealer decreased with time and was dependent upon the microbial susceptibility to them.

scholarly journals Lactic Acid Bacteria (Lactobacillus bulgaricus and Streptococcus thermophillus) in Yogurt Inhibit the Growth of Escherichia coli, Salmonella typhimurium, and Shigella sp. In Vitro

2021 ◽  
Vol 31 (4) ◽  
pp. 2
Author(s):  
IDSAP Peramiarti
Keyword(s):  
Escherichia Coli ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Salmonella Typhimurium ◽  
Pathogenic Bacteria ◽  
Test Method ◽  
P Value ◽  
E Coli ◽  
Significant Difference

Diarrhea is defecation with a frequency more often than usual (three times or more) a day (10 mL/kg/day) with a soft or liquid consistency, even in the form of water alone. Pathogenic bacteria, such as Escherichia coli, Salmonella typhimurium, and Shigella sp., play a role in many cases, to which antibiotics are prescribed as the first-line therapy. However, since antibiotic resistance cases are often found, preventive therapies are needed, such as consuming yogurt, which is produced through a fermentation process by lactic acid bacteria (LAB). This research aimed to determine the activity of lactic acid bacteria (Liactobacillus bulgaricus and Streptococcus thermophilus) in yogurt in inhibiting the growth of the pathogenic bacteria E. coli, S. typhimurium, and Shigella sp. The research applied in vitro with the liquid dilution test method and the true experimental design research method with post-test-only and control group design. The design was used to see the inhibitory effect of yogurt LAB on the growth of E. coli, S. typhimurium, and Shigell sp. to compare the effect of several different yogurt concentrations, namely 20%, 40%, 60%, and 80%. The results of the Least Significance Different analysis showed that there was a significant difference between yogurt with a concentration of 0% and that with various concentrations in inhibiting the growth of E. coli, S. typhimurium, and Shigella sp. with a p-value of &lt;0.05. Whereas, there was no significant difference in the various concentrations of yogurt in inhibiting the growth of the three kinds of bacteria with a p-value of &gt; 0.05.<p class="Default" align="center"> </p>

scholarly journals Evaluation du potentiel antimicrobien et de la toxicité des extraits de Jatropha multifida Linn, (Euphorbiaceae)

2020 ◽  
Vol 151 ◽  
pp. 15550-15558
Author(s):  
Amégninou Agban ◽  
Yao Hoekou ◽  
Passimna Pissang ◽  
Tchadjobo Tchacondo ◽  
Komlan Batawila
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Aqueous Extract ◽  
E Coli ◽  
Toxicological Studies ◽  
Jatropha Multifida

Objectif : L’objectif de ce travail était d’évaluer in vitro l’activité antimicrobienne des extraits de feuilles et tige de Jatropha multifida sur la croissance de Candida albicans, Escherichia coli et Staphylococcus aureus, puis d’évaluer in vivo la toxicité de cette plante. Méthodologie et résultats : Les méthodes de diffusion en milieu gélosé et de microdilution en milieu liquide ont été utilisées pour évaluer l’effet antimicrobien. Une étude en subaigüe était réalisée afin d’explorer les effets toxiques de l’extrait aqueux des feuilles. Les résultats des tests antimicrobiens montrent une activité des extraits de feuilles et tige de J. multifida sur la croissance des souches utilisées avec des diamètres de zones d’inhibition allant de 8 à 25 mm et des concentrations minimales inhibitrices (CMI) variant de 0,039 mg/mL à 1,25 mg/mL à l’exception des souches de E. coli qui sont résistantes aux extraits de la tige. L’administration en subaigüe de l’extrait aqueux des feuilles de J. multifida à la dose de 600 mg/kg entraîne une perte significative de poids chez les souris. Conclusion et applications des résultats : Les extraits aqueux, éthanolique et hydroéthanolique des feuilles et tige de J. multifida possèdent d’activité antimicrobienne et pourraient être utilisés dans le traitement des Candidoses à C. albicans et des infections à S. aureus. Mais l’essai de toxicité subaigüe montre que l’extrait aqueux de la plante serait toxique. Des études toxicologiques approfondies restent donc nécessaires sur ces extraits afin de mieux élucider leur inocuité. Mots-clés : Jatropha multifida, extraits de feuilles et de tige, activités antifongique et antibactérienne, toxicité. Agban et al., J. Appl. Biosci. 2020 Evaluation du potentiel antimicrobien et de la toxicité des extraits de Jatropha multifida Linn, (Euphorbiaceae) 15551 Evaluation of antimicrobial potential and toxicity of Jatropha multifida Linn, (Euphorbiaceae) extracts ABSTRACT Objective: The objective of this study was to evaluate in vitro the antimicrobial activity of leaves and stem of Jatropha multifida extracts against Candida albicans, Escherichia coli and Staphylococcus aureus, and then to evaluate in vivo the toxicity of this plant. Methodology and Results: The agar well-diffusion and the NCCLS broth microdilution methods were used to assess the antimicrobial effect. A subacute study was carried out to explore the toxic effects of the aqueous extract of the leaves. The results of the antimicrobial tests show an activity of the extracts of leaves and stems of J. multifida on the growth of the strains used with diameters of inhibitory zones ranging from 8 to 25 mm and minimum inhibitory concentrations (MIC) varying from 0.039 mg/mL to 1.25 mg/mL exception E. coli strains which are resistant to extracts from the stem. Subacute administration of the aqueous extract of the leaves of J. multifida at a dose of 600 mg/kg leads to a significant loss of weight in the mice. Conclusion and application of findings : The aqueous, ethanolic and hydroethanolic extracts of the leaves and stem of J. multifida have antimicrobial activity and could be used in the treatment of Candidiasis and bacterial infections due respectively to C. albicans and S. aureus. But the subacute toxicity test shows that the aqueous extract of the plant would be toxic. Extensive toxicological studies therefore remain necessary on these extracts in order to better elucidate their safety. Keywords: Jatropha multifida extracts of leaves and stem, antifungal and antibacterial activities, toxicity

scholarly journals Synthesis, Antimicrobial Activity and Molecular Docking of Novel Thiourea Derivatives Tagged with Thiadiazole, Imidazole and Triazine Moieties as Potential DNA Gyrase and Topoisomerase IV Inhibitors

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2766 ◽  
Author(s):  
Heba E. Hashem ◽  
Abd El-Galil E. Amr ◽  
Eman S. Nossier ◽  
Elsayed A. Elsayed ◽  
Eman M. Azmy
Keyword(s):  
Antimicrobial Activity ◽  
Molecular Docking ◽  
Antimicrobial Agents ◽  
Biological Activities ◽  
Topoisomerase Iv ◽  
Thiourea Derivatives ◽  
E Coli ◽  
Cytotoxicity Studies ◽  
Ic50 Values

To develop new antimicrobial agents, a series of novel thiourea derivatives incorporated with different moieties 2–13 was designed and synthesized and their biological activities were evaluated. Compounds 7a, 7b and 8 exhibited excellent antimicrobial activity against all Gram-positive and Gram-negative bacteria, and the fungal Aspergillus flavus with minimum inhibitory concentration (MIC) values ranged from 0.95 ± 0.22 to 3.25 ± 1.00 μg/mL. Furthermore, cytotoxicity studies against MCF-7 cells revealed that compounds 7a and 7b were the most potent with IC50 values of 10.17 ± 0.65 and 11.59 ± 0.59 μM, respectively. On the other hand, the tested compounds were less toxic against normal kidney epithelial cell lines (Vero cells). The in vitro enzyme inhibition assay of 8 displayed excellent inhibitory activity against Escherichia coli DNA B gyrase and moderate one against E. coli Topoisomerase IV (IC50 = 0.33 ± 1.25 and 19.72 ± 1.00 µM, respectively) in comparison with novobiocin (IC50 values 0.28 ± 1.45 and 10.65 ± 1.02 µM, respectively). Finally, the molecular docking was done to position compound 8 into the E. coli DNA B and Topoisomerase IV active pockets to explore the probable binding conformation. In summary, compound 8 may serve as a potential dual E. coli DNA B and Topoisomerase IV inhibitor.

Expression, purification and properties of multidrug efflux proteins

2000 ◽  
Vol 28 (4) ◽  
pp. 513-517 ◽  
Author(s):  
P.J. F. Henderson ◽  
C. K. Hoyle ◽  
A. Ward
Keyword(s):  
Fluorescent Protein ◽  
Affinity Column ◽  
General Strategy ◽  
X Rays ◽  
Multidrug Efflux ◽  
Nmr Studies ◽  
E Coli ◽  
Efflux Proteins

A general strategy is described for the amplified expression, purification and characterization in Escherichia coli of multidrug efflux proteins from Staphylococcus aureus, Bacillus subtilis, Methanococcus janaschii and E. coli. They all catalyse drug/H+ antiport of substrates such as quinolones and ethidium and exemplify a family of putatively 12-helix membrane proteins. The gene for each protein was cloned downstream of the tac promoter in plasmid pTTQ18; an oligonucleotide encoding six histidine residues was added, in frame, to the C-terminus to facilitate purification. Growth conditions were optimized in 1–25-litre cultures of E. coli host strains to amplify the expression of each protein; the retention of activity was confirmed by assays of antibiotic resistance in vivo and/or assays of energized transport activity in vitro with synthetic substrates. Proteins were solubilized in dodecylmaltoside and purified to more than 90% homogeneity with Ni2+-nitrilo-triacetate-affinity column chromography, yielding 5–25 mg per 25 litres of original culture. All the transport proteins migrated anomalously in SDS/PAGE at apparent molecular masses below those predicted from the gene sequence; identity and integrity were therefore confirmed by N-terminal amino acid sequencing and Western blotting for the C-terminal hexahistidine tag. Examination of the secondary structure of detergent-solubilized proteins by CD or Fourier-transform infrared spectroscopy following purification indicated a high content of α-helix (more than 75%). Matrix-assisted laser desorption ionization MS confirmed the high degree of purity and the true molecular mass. The formation of three-dimensional crystals is being attempted but crystals have yet to be grown that diffract X-rays. The growth of two-dimensional protein arrays has been more successful, with diffraction of electrons at low resolution. Proteins have been fused to green fluorescent protein or maltose-binding protein to facilitate these structural analyses. In addition, ligands for efflux proteins labelled with 13C or 15N have been synthesized to implement solid-state NMR studies of the ligand-binding site.

Screening of Antimicrobial Activity and Cytotoxic Effects of Two Cladonia Species

2013 ◽  
Vol 68 (5-6) ◽  
pp. 191-197 ◽  
Author(s):  
Birkan Açıkgöz ◽  
İskender Karaltı ◽  
Melike Ersöz ◽  
Zeynep M. Coşkun ◽  
Gülşah Çobanoğlu ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Activities ◽  
Chloroform Extract ◽  
Cytotoxic Effects ◽  
Minimal Inhibitory Concentrations ◽  
E Coli ◽  
Methanol Extracts ◽  
Gram Positive Bacteria

The present study explores the antimicrobial activity and cytotoxic effects in culture assays of two fruticose soil lichens, Cladonia rangiformis Hoffm. and Cladonia convoluta (Lamkey) Cout., to contribute to possible pharmacological uses of lichens. In vitro antimicrobial activities of methanol and chloroform extracts against two Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli), two Gram-positive bacteria (Enterococcus faecalis and Staphylococcus aureus), and the yeast Candida albicans were examined using the paper disc method and through determination of minimal inhibitory concentrations (MICs). The data showed the presence of antibiotic substances in the chloroform and the methanol extracts of the lichen species. The chloroform extracts exhibited more signifi cant antimicrobial activity than the methanol extracts. However, a higher antifungal activity was noted in the methanol extract of C. rangiformis. The maximum antimicrobial activity was recorded for the chloroform extract of C. convoluta against E. coli. The cytotoxic effects of the lichen extracts on human breast cancer MCF-7 cells were evaluated by the trypan blue assay yielding IC50 values of ca. 173 and 167 μg/ml for the extracts from C. rangiformis and C. convoluta, respectively.

scholarly journals PSIV-B-38 Late-Breaking: Effect of Glutamate (Glu) on Developmental Block and the MZT Relative Genes Expression in Mouse embryo during in Vitro Culture

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 330-331
Author(s):  
Yu Liu ◽  
An Gang Lou ◽  
Shuo Yang ◽  
Zhong Shu Li ◽  
Nan-Zhu Fang
Keyword(s):  
In Vitro Culture ◽  
Mrna Expression ◽  
Marker Gene ◽  
Treated Group ◽  
Mouse Embryos ◽  
Expression Level ◽  
Mrna Expression Level ◽  
Significant Difference ◽  
Developmental Block

Abstract The risk of developmental block in mammal’s embryos is high during in vitro as compare to in vivo environment because the in vitro embryo-culture systems are suboptimal. During in vitro-culture the balance between ROS production and elimination is disturbed and may lead to 2-cell block in mouse embryos [1]. In the current study, we investigated the effects of Glu as anti-developmental block during IVC on ZGA and MZT on mouse embryos. The mouse embryos were divided into control and different level of Glu treated group. The cleavage rate was determined, the ROS and GSH level was investigated using DCHF-DA and CMF2HC respectively. The mRNA expression level of ZGA marker gene such as Eif-1α, Muerv l, Zscan4d and Hsp70.1 was analyzed among the groups using RT-PCR. The transition rate from 2-cell to 4-cell was significantly higher in 6mmol/L Glu treated group as compare to control and others treated groups. No significant difference was recorded in the level of ROS and GSH during MZT stage among the different groups. The mRNA expression level of ZGA marker gene was significantly increased at middle and late stage in 6mmol/L Glu treated group as compare to control and others treated groups. In conclusion, this study shows that the concentration of 6mmol/L Glu could maintain the dynamic balance of GSH and ROS, increase the expression of ZGA marker gene and maintain its high expression pattern of time series, directly participate in the ZGA activated process; ultimately reduce the risk of developmental block to ensure the successful completion of MZT. Reference [1] Lee MT, Bonneau AR, Giraldez AJ.Zygotic Genome Activation during the Maternal-to-Zygotic Transition. Annual Rev Cell Dev Biol [J], 2014, 30:581–613.

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