MicroRNA-186 targets SKP2 to induce p27Kip1-mediated pituitary tumor cell cycle deregulation and modulate cell proliferation

Zongze He,Longyi Chen,Qi Wang,Cheng Yin,Junting Hu,Xiao Hu,Fan Fei,Jian Tang 대한약리학회 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.3

Pituitary tumors are usually benign but can occasionally exhibit hormonal and proliferative behaviors. Dysregulation of the G1/S restriction point largely contributes to the over-proliferation of pituitary tumor cells. F-box protein S-phase kinase-interacting protein-2 (SKP2) reportedly targets and inhibits the expression of p27Kip1, a well-known negative regulator of G1 cell cycle progression. In this study, SKP2 expression was found to be upregulated while p27Kip1 expression was determined to be downregulated in rat and human pituitary tumor cells. Furthermore, SKP2 knockdown induced upregulation of p27Kip1 and cell growth inhibition in rat and human pituitary tumor cells, while SKP2overexpression elicited opposite effects on p27Kip1 expression and cell growth. The expression of microRNA-186 (miR-186) was reported to be reduced in pituitary tumors. Online tools predicted SKP2 to be a direct downstream target of miR-186, which was further confirmed by luciferase reporter gene assays. Moreover, miR-186 could modulate the cell proliferation and p27Kip1-mediated cell cycle alternation of rat and human pituitary tumor cells through SKP2. As further confirmation of these findings, miR-186 and p27Kip1 expression were downregulated, while SKP2 expression was upregulated in human pituitary tumor tissue samples; thus, SKP2 expression negatively correlated with miR-186 and p27Kip1 expression. In contrast, miR-186 expression positively associated with p27Kip1 expression. Taken together, we discovered a novel mechanism by which miR-186/SKP2 axis modulates pituitary tumor cell proliferation through p27Kip1-mediated cell cycle alternation.

MicroRNA-186 targets SKP2 to induce p27^Kip1-mediated pituitary tumor cell cycle deregulation and modulate cell proliferation

He, Zongze,Chen, Longyi,Wang, Qi,Yin, Cheng,Hu, Junting,Hu, Xiao,Fei, Fan,Tang, Jian The Korean Society of Pharmacology 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.3

Pituitary tumors are usually benign but can occasionally exhibit hormonal and proliferative behaviors. Dysregulation of the G1/S restriction point largely contributes to the over-proliferation of pituitary tumor cells. F-box protein S-phase kinase-interacting protein-2 (SKP2) reportedly targets and inhibits the expression of $p27^{Kip1}$, a well-known negative regulator of G1 cell cycle progression. In this study, SKP2 expression was found to be upregulated while $p27^{Kip1}$ expression was determined to be downregulated in rat and human pituitary tumor cells. Furthermore, SKP2 knockdown induced upregulation of $p27^{Kip1}$ and cell growth inhibition in rat and human pituitary tumor cells, while SKP2overexpression elicited opposite effects on $p27^{Kip1}$ expression and cell growth. The expression of microRNA-186 (miR-186) was reported to be reduced in pituitary tumors. Online tools predicted SKP2 to be a direct downstream target of miR-186, which was further confirmed by luciferase reporter gene assays. Moreover, miR-186 could modulate the cell proliferation and $p27^{Kip1}$-mediated cell cycle alternation of rat and human pituitary tumor cells through SKP2. As further confirmation of these findings, miR-186 and $p27^{Kip1}$ expression were downregulated, while SKP2 expression was upregulated in human pituitary tumor tissue samples; thus, SKP2 expression negatively correlated with miR-186 and $p27^{Kip1}$ expression. In contrast, miR-186 expression positively associated with $p27^{Kip1}$ expression. Taken together, we discovered a novel mechanism by which miR-186/SKP2 axis modulates pituitary tumor cell proliferation through $p27^{Kip1}$-mediated cell cycle alternation.

CHINA’S ROLE IN A NORTHEAST ASIAN COMMUNITY

Ruan Zongze 경남대학교 극동문제연구소 2006 ASIAN PERSPECTIVE Vol.30 No.3

Evaluation on direct aqueous carbonation of industrial/mining solid wastes for CO2 mineralization

Zijian Li,Jie Chen,Zongze Lv,Yichao Tong,Jingyu Ran,Changlei Qin 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-

Carbonation of industrial alkaline resources can achieve dual effects of CO2 sequestration and solid wastemanagement, and the carbonated product may act as a potential cementitious backfill material. Based onthis idea, CO2 mineralization characteristics and potential of typical industrial solid wastes, mine tailingsand their mixtures are investigated by direct aqueous carbonation, and effects of reaction parameters,including particle size, reaction temperature, solid-to-liquid ratio, CO2 concentration, are systematicallyexplored. Results show that industrial solid wastes with a high Ca content such as carbide slag have bettercarbonation activity with the maximum CO2 sequestration capacity of 544.6 g-CO2/kg, while the carbonationof mine tailings is very weak. The combination of coal fly ash with tailings has a potentialstimulative effect during carbonation. Moreover, influences of carbonation parameters are revealed inthis study, and optimal reaction parameters are determined to be particle size below 75 lm, temperatureof 60 C, solid-to-liquid ratio of 100 g/L, and CO2 concentration of 15% within mild range. These resultscan provide fundamental knowledge for the integrated CO2 mineralization and goaf backfilling, andaccelerate carbon reduction and waste resource utilization.

Chaos and Predictable Time-Scale of the Brown Planthopper Nilaparvata Lugens(St${\aa}$l) Occurrence System

Ma, Fei,Ding, Zongze,Cheng, Xianian Korean Society of Applied Entomology 2001 Journal of Asia-Pacific Entomology Vol.4 No.1

The brown planthopper (BPH: Nilaparvata lugens(St${\aa}$l) occurrence time series data from June to November of 1986-1998 in Taihu Lake area, Jingsu province, China, were used to calculate correlation dimension ($D_2$(m)) and the second-order Renyientropy($k_2$). Based on the methods of the approximation Kolmogorov's entropy and phase space extension, the average predictable time scale of BPH occurrence system was computed. The results indicate that the BPH occurrence system is a chaotic system with fractal dimension ($D_2$(m)) form 4.34 to 4.43 and saturation embedding dimension $m_c =10$. And it could be inferred that the BPH occurrence evolution would be described by 5-10 steps required by the development of these chaotic attractors in the multi-dimensional phase space. The average predictable time scale is about 114.0-253.2 days, and the really predictable time scale of 79.0-175.5 days resulted from the e-folding expansion of trajectories in phase space. The effect of the lag time $\tau$ was examined during the continuation of phase space. And it was found that ($D_2$(m)) is convergent with respect to $\tau$. While the BPH occurrence time series data every four days were analyzed by the continuation of phase space with $\tau$=5, the coordinate components was independent of each other, and the dynamically characteristic quantity of the system was stable and reliable.

Cel8H, a Novel Endoglucanase from the Halophilic Bacterium Halomonas sp. S66-4: Molecular Cloning, Heterogonous Expression, and Biochemical Characterization

Xiaoluo Huang,Fei Huang,Hui Wang,Zongze Shao,Yuzhi Hong,Ling Lin,Chanjuan Li,Ziduo Liu 한국미생물학회 2010 The journal of microbiology Vol.48 No.3

A recombinant Escherichia coli clone expressing an endoglucanase was identified from a genomic library of the halophilic bacterium Halomonas sp. S66-4, and the enzyme was designated Cel8H. The cel8H gene consisted of 1,053 bp and encoded 350 amino acids sharing the highest identity of 48% to other known endoglucanases. The protein was expressed in E. coli BL21 (DE3) and purified to homogeneity. The purified recombinant enzyme had an optimal activity of 4.9 U/mg at pH 5 and 45°C toward the substrate carboxymethylcellulose. It exhibited extraordinary properties which differed from endoglucanases reported previously at the point of high salt tolerance above 5 M, simultaneously with high pH stability at pH 4-12 and high temperature stability at 40-60°C. Various substrate tests indicated that the enzyme hydrolyzes β-1,4-glucosidic bonds specifically.

Molecular Cloning, Purification, and Characterization of a Novel, Acidic, pH-Stable Endoglucanase from Martelella mediterranea

Junli Dong,Yuzhi Hong,Ziduo Liu,Zongze Shao 한국미생물학회 2010 The journal of microbiology Vol.48 No.3

A novel gene encoding an endoglucanase designated Cel5D was cloned from a marine bacterium Martelella mediterranea by genomic library. The gene had a 1,113 bp opening reading frame encoding a 371-amino-acid protein with a molecular mass of 40,508 Da and containing a putative signal peptide (41 amino acids). Cel5D had low similarity (48-51% identity) with other known endoglucanases and consisted of one single catalytic domain, which belonged to the glycosyl hydrolase family 5. The maximum activity of Cel5D was observed at 60°C and pH 5.0. Cel5D displayed broad pH stability within the range of pH 3.0-11.0 and retained hydrolytic activity in the presence of a wide variety of metal ions and some chemical reagents. These characteristics suggest that the enzyme has considerable potential in industrial applications.

Parahaliea maris sp. nov., isolated from surface seawater and emended description of the genus Parahaliea

Yang Liu,Juan Du,Jun Zhang,Qiliang Lai,Zongze Shao,Honghui Zhu 한국미생물학회 2020 The journal of microbiology Vol.58 No.2

A Gram-stain-negative, strictly aerobic, short-rod-shaped, and non-motile bacterial strain designated HSLHS9T was isolated from surface seawater collected from the South China Sea. Strain HSLHS9T could grow at 15–41°C (optimum 28°C), at pH 5.0–9.0 (optimum 6.0–7.0), and in 0–7% (w/v) NaCl (optimum 2–3%). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain HSLHS9T shared high identities with the closely related Parahaliea aestuarii S2-26T (98.6%) and Parahaliea mediterranea 7SM29T (97.8%) and formed a distinct lineage within the genus Parahaliea. Wholegenome sequencing of strain HSLHS9T revealed the size of 4.8 Mbp and DNA G + C content of 61.8 mol%. Strain HSLHS9T shared the digital DNA-DNA hybridization values of 22.4% and 23.0%, and the average nucleotide identities of 79.7% and 79.9%, respectively, with the two type strains above. The predominant cellular fatty acids of the strain were summed feature 8 (C18:1 ω6c and/or C18:1 ω7c), summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C17:1 ω8c, and C16:0. The sole isoprenoid quinone was identified as Q-8. The polar lipids were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, aminolipid, and two glycolipids. Based on taxonomic data obtained in this study, it is suggested that strain HSLHS9T represents a novel species of the genus Parahaliea, for which the name Parahaliea maris sp. nov. is proposed. The type strain is HSLHS9T (= MCCC 1A06717T = KCTC 52307T). An emended description of the genus Parahaliea is also provided.

Diversity and Antiaflatoxigenic Activities of Culturable Filamentous Fungi from Deep-Sea Sediments of the South Atlantic Ocean

( Ying Zhou ),( Xiujun Gao ),( Cuijuan Shi ),( Mengying Li ),( Wenwen Jia ),( Zongze Shao ),( Peisheng Yan ) 한국균학회 2021 Mycobiology Vol.49 No.2

Despite recent studies, relatively few are known about the diversity of fungal communities in the deep Atlantic Ocean. In this study, we investigated the diversity of fungal communities in 15 different deep-sea sediments from the South Atlantic Ocean with a culturedependent approach followed by phylogenetic analysis of ITS sequences. A total of 29 fungal strains were isolated from the 15 deep-sea sediments. These strains belong to four fungal genera, including Aspergillus, Cladosporium, Penicillium, and Alternaria. Penicillium, accounting for 44.8% of the total fungal isolates, was a dominant genus. The antiaflatoxigenic activity of these deep-sea fungal isolates was studied. Surprisingly, most of the strains showed moderate to strong antiaflatoxigenic activity. Four isolates, belonging to species of Penicillium polonicum, Penicillium chrysogenum, Aspergillus versicolor, and Cladosporium cladosporioides, could completely inhibit not only the mycelial growth of Aspergillus parasiticus mutant strain NFRI-95, but also the aflatoxin production. To our knowledge, this is the first report to investigate the antiaflatoxigenic activity of culturable deep-sea fungi. Our results provide new insights into the community composition of fungi in the deep South Atlantic Ocean. The high proportion of strains that displayed antiaflatoxigenic activity demonstrates that deep-sea fungi from the Atlantic Ocean are valuable resources for mining bioactive compounds.

Characterization of Marinilongibacter aquaticus gen. nov., sp. nov., a unique marine bacterium harboring four CRISPR-Cas systems in the phylum Bacteroidota

Zhang Dao-Feng,Yao Yu-Fang,Xue Hua-Peng,Fu Zi-Yue,Zhang Xiao-Mei,Shao Zongze 한국미생물학회 2022 The journal of microbiology Vol.60 No.9

A novel bacterium, designated YYF0007T, was isolated from an agar-degrading co-culture. The strain was found harboring four CRISPR-Cas systems of two classes in the chromosome and subsequently subjected to a study on polyphasic taxonomy. Pairwise analyses of the 16S rRNA gene sequences indicated that strain YYF0007T had highest 16S rRNA gene sequence similarity (92.2%) to Jiulongibacter sediminis JN- 14-9T. The phylogenomic trees based on the 16S rRNA gene and 269 single-copy orthologous gene clusters (OCs) indicated that strain YYF0007T should be recognized as a novel genus of the family Spirosomaceae. The cells were Gramstain- negative, nonmotile, strictly aerobic, and straight long rods with no flagellum. Optimum growth occurred at 28°C and pH 7.0 with the presence of NaCl concentration 1.0–3.0% (w/v). The strain showed oxidase and catalase activities. The major fatty acids were C16:1ω5c, iso-C15:0 and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The predominant isoprenoid quinone was MK-7. The complete genome size was 4.64 Mb with a DNA G + C content of 44.4%. Further typing of CRISPR-Cas systems in the family Spirosomaceae and the phylum Bacteroidota indicated that it was remarkable for strain YYF0007T featured by such a set of CRISPR-Cas systems. This trait highlights the applications of strain YYF- 0007T in studies on the evolutionary dynamics and bacterial autoimmunity of CRISPR-Cas system as a potential model. The name Marinilongibacter aquaticus gen. nov., sp. nov. is proposed, and the type strain is YYF0007T (= MCCC 1K06017T = GDMCC 1.2428T = JCM 34683T).