• BMB Reports
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• 제55권2호
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• pp.92-97
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• 2022

Lysine methylation is one of the most important histone modifications that modulate chromatin structure. In the present study, the roles of the histone lysine demethylases JMJD2a and LSD1 in CK2 downregulation-mediated senescence were investigated. The ectopic expression of JMJD2a and LSD1 suppressed the induction of senescence-associated β-galactosidase activity and heterochromatin foci formation as well as the reduction of colony-forming and cell migration ability mediated by CK2 knockdown. CK2 downregulation inhibited JMJD2a and LSD1 expression by activating the mammalian target of rapamycin (mTOR)-ribosomal p70 S6 kinase (p70S6K) pathway. In addition, the down-regulation of JMJD2a and LSD1 was involved in activating the p53-p21^Cip1/WAF1-SUV39h1-trimethylation of the histone H3 Lys9 (H3K9me3) pathway in CK2-downregulated cells. Further, CK2 downregulation-mediated JMJD2a and LSD1 reduction was found to stimulate the dimethylation of Lys370 on p53 (p53K370me2) and nuclear import of SUV39h1. Therefore, this study indicated that CK2 downregulation reduces JMJD2a and LSD1 expression by activating mTOR, resulting in H3K9me3 induction by increasing the p53K370me2-dependent nuclear import of SUV39h1. These results suggest that CK2 is a potential therapeutic target for age-related diseases.

• 대한두경부종양학회지
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• 제25권2호
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• pp.123-127
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• 2009

Objectives : The aim of this study was to investigate immunohistochemical expression of CK7, CK19, CK20, SMA and Ki-67 in Adenoid cystic carcinoma(ACC) of the Head and Neck. Material and Methods : Sixteen patients who were treated in Chungbuk National University Hospital from 1992 to 2004, were included in this study. Ten ACCs, 3 MECs, 1 Salivary duct carcinoma, 1 Adenocarcinoma(NOS), and 1 cacinoma ex pleomorphic adenoma were analyzed immunohistochemically for CK7, CK19, CK20, SMA, and Ki-67. Results : CK7 was expressed in 100% of the adenoid cystic carcinoma and 75% of the other tumors. CK19 was expressed in 75% of the adenoid cystic carcinoma and 100% of the other tumors. CK20 was not expressed in all tumors. SMA was expressed in 88.9% of the adenoid cystic carcinoma and not expressed in the other tumors. Ki-67 was expressed in low level in the adenoid cystic carcinoma. Conclusion : The Ki-67 index could explain the natural course of tumor. Immunohistochemistry of CK7, CK19, CK20, SMA and Ki-67 expression in Adenoid cystic carcinoma may provide useful information to diagnosis.

• Asian Pacific Journal of Cancer Prevention
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• 제17권9호
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• pp.4217-4222
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• 2016

Purpose: To compare the expression level of CK 15 in normal esophageal and esophageal squamous-cell carcinoma (ESCC) tissues and analyse possible functions of CK15 in occurrence and development. Materials and Methods: Immunohistochemistry was used to compare CK14, CK15 and proliferating cell nuclear antigen (PCNA) expression levels in ESCCs. Expression level of CK15 was also assessed by Western blotting. In addition, levels of CK15, cytokeratin 19 fragment antigen 21-1 (CYFRA21-1) and PCNA were detected in serum by enzymelinked immunosorbent assay (ELISA) and chemiluminescence methods. Relationships between clinicopathological parameters and CK14 and CK15 expression were then analyzed. Results: According to immunohistochemistry, in esophageal and intraepithelial neoplasia (SIN) tissues, the expression of CK14, CK15 and PCNA localized to basal layer of the epithelium. CK14 and CK15 levels were higher in normal esophageal squamous epithelial tissue than in SIN and ESCC, and greater in highly differentiated than poorly differentiated carcinoma tissue. By Western blotting, we found more pronounced expression of CK15 in normal esophageal tissue, compared with carcinoma tissue. The specificity of changed CK15 and CYFRA21-1 expression was respectively 90.0% and 96.7% in serum of ESCC patients. Joint detection could improve the sensitivity of esophageal carcinoma diagnosis. Relationships between CK14, CK15 expression and clinical parameters were not statistically significant (P>0.05). Postoperative survival in patients of CK14, CK15 positive expression was longer than with negative expression ($x^2=4.35$, P=0.037; $x^2=9.852$, P=0.002). Conclusions: CK15 expression decreased in esophageal squamous cell carcinoma tissue and serum of esophageal squamous carcinoma patients. We infer that CK15 may play an important role for the occurrence and development of esophageal squamous-cell carcinoma. In the future, CK15 may be used for the diagnosis, treatment and prognostic evaluation of esophageal squamous-cell carcinoma.

• 한국임상수의학회지
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• 제9권2호
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• pp.417-426
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• 1992

Total CPK activities and CPK isoenzymes fractions of the sera and some organ tissues of dogs were examined to acquire the basic data of canine CPK available in clinical practice. In addition fluctuation of serum total CPK activities and CPK isoenzymes fractions is artificially induced canine myocardial infarctino were investigated to know the availabity of them as indicators for the diagnosis of myocardial infarction. For the determination of serum total CPK activities, total 22 clinically healthy dogs(7 to 30 months old, 15 of female and 7 of male) were used and 15 out of 22 dogs were used for the determination of serum CPK isoenzymes fractions. For the determination of total CPK activities and CPK isoenzymes fractions. some organ tissues (the hearts, skeletal muscles and brains )from 3 dogs were examined. For the fluctuation of total CPK activities and CPK isoenzymes fractions in the sera from artificially induced canine acute myocardial infarction, 3 dogs of coronary artery ligated experimental group and 3 of control group were used. The results obtained were as follows ; 1. Serum total CPK activities of normal dogs were 106.2${\pm}$29.9(31.3∼148.1)IU/$\ell$. 2. The pattern of serum CPK isoenzymes fractions in normal dogs was high with decreasing order of CK$_1$>CK$_3$>CK$_2$. 3. Total CPK activities of organ tissues were high with decreasing order of the skeletal muscles > the hearts > the brains. 4. The pattern of CPK isoenzymes fractions of the organ tissues was high with decreasing order of CK$_3$>CK$_2$ in the hearts and only CK$_3$(100%) was detected in the skeletal muscles. Further they were high with decreasing order of CK$_1$>CK$_3$>CK$_2$ in the trains. 5. Serum total CPK activities in experimental group were changed with higher values than those of control group. 6. In the fluctuation of serum CPK isoenzymes fractions the CK$_1$ CK$_2$ and CK$_3$ values were changed with higher values than those of control group. 7. It was become clear that the finding of Increase of serum total CPK activities, and CK$_2$ and CK$_3$ was important for the diagnosis of myocardial infarction.

• 한국식품조리과학회지
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• 제22권4호통권94호
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• pp.535-544
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• 2006

토마토 김치의 발효특성을 살펴보기 위하여 pH, 산도, 색도, Texture, 미생물수, 당도 및 염도 측정, Na와 K 함량을 측정하였고 DPPH free radical 소거 활성과 퐁 폴리페놀 함량을 조사하였으며 최종적으로 관능적 평가를 한 결과는 다음과 같았다. 1. 토마토김치(Tomato Kimchi, TK)의 pH는 제조 직후, 배추김치(Chinese Cabbage Kimchi, CK)보다 낮은 값을 보였으나 발효 48시간 후 CK의 PH가 급격히 낮아져 이후 거의 비슷한 값을 보였다. 2. TK의 산도는 초기값은 CK보다 높았으나 2일후에는 CK와 동일한 산도를 나타냈다. 3. TK의 명도(L값)는 발효 전 기간에 걸쳐 CK에 비해 낮았다. 적색도(a값)는 TK, CK모두 발효 4시간에 급격히 증가했으며 이후 거의 비슷한 값을 보였다. 황색도(b값)는 발효전반에 걸쳐 TK의 값이 CK보다 다소 낮게 나타났다. 4. TK의 경도(hardness)는 발효와 더불어 낮아졌으나 발효 전반에 걸쳐 CK보다 다소 높은 값을 보였다. 5. TK의 초기 총 균수는 2.7${\times}$10$^4$ cfu/ml으로 CK의 6.1${\times}$10$^4$ cfu/ml보다 적었다. 그러나 24시간에 각각3.1${\times}$10$^6$ cfu/ml, 3.5${\times}$10$^6$ cfu/ml로 거의 비슷해졌다가 발효 120시간까지 약간 높은 값을 보였다. TK의 젖산균수도 초기에는 CK보다 낮았으나 급격히 증가하여 발효 48시간 이후 CK의 3.3${\times}$10$^6$ cfr/ml보다 높은값 5.1${\times}$10$^6$ cfu/ml를 나타내 총 균수의 증가는 젖산균 수의 영향을 받는 것으로 나타났다. 6. 발효 초기의 TK의 당 농도($^{\circ}$Brix)는 7.4, CK는 7.3이었다. TK와 CK는 발효가 진행됨에 따라 당 농도가 감소했다. 발효 48시간에 TK는 6.4, CK는 6.6$^{\circ}$Brix로 발효 120까지 TK의 당 농도가 CK보다 낮은 값을 보였다. 7. TK와 CK의 발효 초기의 염도는 TK가 6.7, CK가 6.5% 였다. TK와 CK는 발효가 진행됨에 따라 염농도가 감소했다. 발효 48시간에 TK 5.1, CK 5.2%로 발효 120시간까지 TK가 CK보다 다소 낮은 값을 보였다. 8. TK와 CK의 Na와 K의 함량을 초기와 숙성적기인 48시간에 분석한 결과, TK와 CK의 Na 함량은 초기에 860.09 895.26 mg/100g이었고, 48시간에는 각각 867.57, 683.98 mg/100g이었다. K 함량은 초기에각각 352.26, 365.77 mg/100g이었고, 48시간에는 343.73, 345.51 mg/100g이었다. 9. TK와 CK의 Methanol 추출액을 대조군 1% BHT에 대해 DPPH free radical 소거 활성을 비교한 결과, TK와 CK의 초기 값은 큰 차이가 없었으나 발효가 진행됨에 따라 TK의 DPPH 활성이 약간 증가되며, 발효 120시간 후에는 초기 값보다 10% 증가한 값을 보였다. 10. 토마토의 총 페놀함량은 280 mg/100g으로 배추 60 mg/100g보다 거의 5배 높았다. 11. TK와 CK의 20$^{\circ}$C 에서 발효 2일후의 관능적 특성은신맛은 유의적인 차이를 보이지 않았다. 외관, 색상,향, 상큼한 맛, 견고성, 매운맛, 짠맛, 전반적인 기호도 면에서도 유의적인 차이를 보였으며 특히, 색상과 상큼한 맛, 매운 맛은 유의적인 차(p<0.01)를 보였으며 관능적 품질이 우수한 것으로 나타났다.

• 생명과학회지
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• 제23권2호
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• pp.299-305
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• 2013

Paenibacillus는 호기성의 내생포자를 형성하는 그람양성균으로써 이전에는 Bacillus로 분류되었다. Paenibacillus sp. CK214 균주는 LB agar 평판배지에서 높은 swarming 운동 능력을 가지고 Paenibacillus 특유의 집락 형태를 나타내었지만 glucose가 첨가된 평판배지에서는 운동 능력을 상실하였다. 투과전자현미경(TEM)을 이용하여 glucose 조건에 따른 CK214 균주의 편모를 관찰하면 LB agar 평판배지에서 배양한 CK214 균주는 주모성의 편모를 가지는 반면 glucose를 첨가한 평판배지에서 배양한 CK214 균주의 경우 주모성 편모가 나타나지 않는 것을 확인할 수 있었다. 물리적 충격과 원심분리를 통해 분리한 CK214 균주의 filament 구성 단백질을 SDS-PAGE를 통해 확인하였으며, 약 29 kDa 크기의 단일 단백질 밴드가 나타났다. Edwardsiella tarda 균주의 flagellin 단백질에 특이적인 항체를 이용한 immunoblotting 수행 결과, 이 단일 단백질 밴드는 flagellin 단백질임이 확인되었다. Glucose조건에 따른 CK214 균주의 flagellin 단백질의 발현을 단백질 수준에서 관찰한 결과, glucose가 첨가된 조건에서 생장한 CK214 균주에서의 flagellin 단백질 발현이 glucose가 없는 조건일 때에 비해 감소하는 것을 확인할 수 있었다.

• Molecules and Cells
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• 제42권11호
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• pp.773-782
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• 2019

Cellular senescence is an irreversible form of cell cycle arrest. Senescent cells have a unique gene expression profile that is frequently accompanied by senescence-associated heterochromatic foci (SAHFs). Protein kinase CK2 (CK2) downregulation can induce trimethylation of histone H3 Lys 9 (H3K9me3) and SAHFs formation by activating SUV39h1. Here, we present evidence that the PI3K-AKT-mTOR-reactive oxygen species-p53 pathway is necessary for CK2 downregulation-mediated H3K9me3 and SAHFs formation. CK2 downregulation promotes SUV39h1 stability by inhibiting its proteasomal degradation in a p53-dependent manner. Moreover, the dephosphorylation status of Ser 392 on p53, a possible CK2 target site, enhances the nuclear import and subsequent stabilization of SUV39h1 by inhibiting the interactions between p53, MDM2, and SUV39h1. Furthermore, $p21^{Cip1/WAF1}$ is required for CK2 downregulation-mediated H3K9me3, and dephosphorylation of Ser 392 on p53 is important for efficient transcription of $p21^{Cip1/WAF}$. Taken together, these results suggest that CK2 downregulation induces dephosphorylation of Ser 392 on p53, which subsequently increases the stability of SUV39h1 and the expression of $p21^{Cip1/WAF1}$, leading to H3K9me3 and SAHFs formation.

• Molecules and Cells
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• 제37권8호
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• pp.620-627
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• 2014

We have previously shown that microRNAs (miRNAs) miR-760, miR-186, miR-337-3p, and miR-216b stimulate premature senescence through protein kinase CK2 (CK2) downregulation in human colon cancer cells. Here, we examined whether these four miRNAs are involved in the replicative senescence of human lung fibroblast IMR-90 cells. miR-760 and miR-186 were significantly upregulated in replicatively senescent IMR-90 cells, and their joint action with both miR-337-3p and miR-216b was necessary for efficient downregulation of the ${\alpha}$ subunit of CK2 ($CK2{\alpha}$) in IMR-90 cells. A mutation in any of the four miRNA-binding sequences within the $CK2{\alpha}3^{\prime}$-untranslated region (UTR) indicated that all four miRNAs should simultaneously bind to the target sites for $CK2{\alpha}$ downregulation. The four miRNAs increased senescence-associated ${\beta}$-galactosidase (SA-${\beta}$-gal) staining, p53 and $p21^{Cip1/WAF1}$ expression, and reactive oxygen species (ROS) production in proliferating IMR-90 cells. $CK2{\alpha}$ overexpression almost abolished this event. Taken together, the present results suggest that the upregulation of miR-760 and miR-186 is associated with replicative senescence in human lung fibroblast cells, and their cooperative action with miR-337-3p and miR-216b may induce replicative senescence through $CK2{\alpha}$ downregulation-dependent ROS generation.

• 생명과학회지
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• 제21권12호
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• pp.1716-1720
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• 2011

섬유소를 비롯한 단백질, 지질, 녹말을 분해할 수 있는 세균을 된장으로부터 분리하여 동정한 결과 Bacillus subtilis로 분류되었으며, Bacillus subtilis CK-2로 명명하였다. 분리균주는 $40\sim45^{\circ}C$의 비교적 넓은 온도 범위와 pH 6~9의 넓은 pH 범위, 그리고 NaCl 0~3% 범위에서 잘 자랐으며, 높은 자가분해효소 활성을 갖는 것을 알 수 있었다. B. subtilis CK-2가 분비하는 가수분해효소들은 대부분 세균의 생장과 거의 비례적으로 세포외 활성을 나타내는 1차 대사산물로 확인되었다. 이상의 결과로부터 B. subtilis CK-2는 농수임산물 폐기물이나 음식물 폐기물의 퇴비화, 사료 생산 등에 유용하게 이용될 수 있을 것으로 생각한다.

• BMB Reports
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• 제39권3호
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• pp.311-318
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• 2006

One of the biggest group of proteins influenced by protein kinase CK2 is formed by factors engaged in gene expression. Here we have reported recently identified yeast transcription elongation factor Elf1 as a new substrate for both monomeric and tetrameric forms of CK2. Elf1 serves as a substrate for both the recombinant CK2$\alpha$' ($K_m$ 0.38 ${\mu}M$) and holoenzyme ($K_m$ $0.13\;{\mu}M$). By MALDI-MS we identified the two serine residues at positions 95 and 117 as the most probable in vitro phosphorylation sites. Co-immunoprecypitation experiments show that Elf1 interacts with catalytic ($\alpha$ and $\alpha$') as well as regulatory ($\beta$ and $\beta$') subunits of CK2. These data may help to elucidate the role of protein kinase CK2 and Elf1 in the regulation of transcription elongation.