• 제목/요약/키워드: proliferation, migration

검색결과 591건 처리시간 0.031초

암종양유전자 SETDB1과 FosB 발현에 대한 p53의 음성 조절기작 (Negative Regulation of Tumor Suppressor p53 at the Promoter Regions of Oncogenic SETDB1 and FosB Genes)

  • 윤현지;나한흠;김근철
    • 생명과학회지
    • /
    • 제30권12호
    • /
    • pp.1070-1077
    • /
    • 2020
  • 암세포에 항암제를 처리하게 되면, 세포증식, 이동성 또는 약물 내성과 관련된 많은 유전자들의 발현 변화가 발생하며, 유전자 발현 변화는 상호간의 조절 네트워크에 의해 밀접하게 연결될 수도 있다고 추측된다. 본 연구에서 p53 유전자 유무가 다른 A549와 H1299 인간 폐암세포에 독소루비신을 처리하면, 원종양유전자인 FosB의 발현은 증가하지만, 원종양유전자인 SETDB1의 발현은 감소하지만, 단백질 발현의 양적인 차이가 발생한다는 사실을 알 수 있었다. TF motif binding 분석 프로그램을 이용하여 SETDB1과 FosB 프로모터지역에서의 p53단백질의 결합가능성을 분석한 결과, SETDB1의 경우 18부위, FosB의 경우 21 부위의 p53 결합부위를 예측할 수 있었다. SETDB1과 FosB 프로모터의 subcloning하여 luciferase 분석을 수행한 결과, p53은 SETDB1과 FosB을 음성적으로 조절한다는 사실을 알 수 있었다. 또한, H1299 세포에 p53의 과발현은 SETDB1 과 FosB의 발현을 감소시킬 수 있음을 RT-PCR, western blot, qPCR, 면역염색 실험을 통해 확인하였다. 이러한 결과를 종합하여 본다면, p53에 의한 SETDB1과 FosB 유전자 발현 조절은 항암제 처리과정에서 나타나는 암세포의 사멸과 생존에 대한 기능적 조절 네트워크로 사료된다.

Combination Therapy of the Active KRAS-Targeting Antibody inRas37 and a PI3K Inhibitor in Pancreatic Cancer

  • Lee, Ji Eun;Woo, Min Gyu;Jung, Kyung Hee;Kang, Yeo Wool;Shin, Seung-Min;Son, Mi Kwon;Fang, Zhenghuan;Yan, Hong Hua;Park, Jung Hee;Yoon, Young-Chan;Kim, Yong-Sung;Hong, Soon-Sun
    • Biomolecules & Therapeutics
    • /
    • 제30권3호
    • /
    • pp.274-283
    • /
    • 2022
  • KRAS activating mutations, which are present in more than 90% of pancreatic cancers, drive tumor dependency on the RAS/mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase (PI3K)/AKT signaling pathways. Therefore, combined targeting of RAS/MAPK and PI3K/AKT signaling pathways may be required for optimal therapeutic effect in pancreatic cancer. However, the therapeutic efficacy of combined MAPK and PI3K/AKT signaling target inhibitors is unsatisfactory in pancreatic cancer treatment, because it is often accompanied by MAPK pathway reactivation by PI3K/AKT inhibitor. Therefore, we developed an inRas37 antibody, which directly targets the intra-cellularly activated GTP-bound form of oncogenic RAS mutation and investigated its synergistic effect in the presence of the PI3K inhibitor BEZ-235 in pancreatic cancer. In this study, inRas37 remarkably increased the drug response of BEZ-235 to pancreatic cancer cells by inhibiting MAPK reactivation. Moreover, the co-treatment synergistically inhibited cell proliferation, migration, and invasion and exhibited synergistic anticancer activity by inhibiting the MAPK and PI3K pathways. The combined administration of inRas37and BEZ-235 significantly inhibited tumor growth in mouse models. Our results demonstrated that inRas37 synergistically increased the antitumor activity of BEZ-235 by inhibiting MAPK reactivation, suggesting that inRas37 and BEZ-235 co-treatment could be a potential treatment approach for pancreatic cancer patients with KRAS mutations.

P3H4 promotes renal cell carcinoma progression and suppresses antitumor immunity via regulating GDF15-MMP9-PD-L1 axis

  • Tian, Shuo;Huang, Yan;Lai, Dong;Wang, Hanfeng;Du, Songliang;Shen, Donglai;Chen, Weihao;Xuan, Yundong;Lu, Yongliang;Feng, Huayi;Zhang, Xiangyi;Zhao, Wenlei;Wang, Chenfeng;Wang, Tao;Wu, Shengpan;Huang, Qingbo;Niu, Shaoxi;Wang, Baojun;Ma, Xin;Zhang, Xu
    • Advances in nano research
    • /
    • 제12권6호
    • /
    • pp.639-652
    • /
    • 2022
  • The prolyl 3-hydroxylase family member 4 (P3H4), is associated with post-translational modification of fibrillar collagens and aberrantly activated in cancer leading to tumor progression. However, its role in clear cell renal cell carcinoma (ccRCC) is still unknown. Here we reported that P3H4 was highly expressed in renal cancer tissues and significantly positive correlated with poor prognosis. Knockdown of P3H4 inhibited the proliferation, migration and metastasis of renal cancer cells in vitro and in vivo, and also, overexpression of it enhanced the oncogenic process. Mechanistically, P3H4 depletion decreased the levels of GDF15-MMP9 axis and repressed its downstream signaling. Further functional studies revealed that inhibition of GDF15 suppressed renal cancer cell growth and GDF15 recombinant human protein (rhGDF15) supplementation effectively rescued the inhibitory effect induced by P3H4 knockdown. Moreover, decreased levels of MMP9 caused by inhibition of P3H4-GDF15 signaling constrained the expression of PD-L1 and suppression of P3H4 accordingly promoted anti-tumor immunity via stimulating the infiltration of CD4+ and CD8+ T cells in syngeneic mice model. Taken together, our findings firstly demonstrated that P3H4 promotes ccRCC progression by activating GDF15-MMP9-PD-L1 axis and targeting P3H4-GDF15-MMP9 signaling pathway can be a novel strategy of controlling ccRCC malignancy.

간암 세포주 HepG2에 대한 맥문동탕(麥門冬湯) 추출물의 항암 및 항전이 효능 (Anti-carcinogenetic and Anti-metastatic Effects of Extract from Maekmoondong-tang in HepG2 Cells)

  • 전명숙;천진미;윤태숙;이아영;문병철;추병길;김성환;김호경
    • 대한본초학회지
    • /
    • 제24권3호
    • /
    • pp.161-167
    • /
    • 2009
  • Objectives : Maekmoondong-tang (MMDT), a Korean herbal medicine, has been used to treat severe dry cough in patients with bronchitis and pharyngitis. MMDT has been reported to have anti-inflammatory, anti-allergic, immunomodulatory, secretory-modulating, and metabolic regulatory actions. However, there are no evidence in regard to the effects of MMDT on carcinogenesis and metastasis. Here, we investigated the effects of 70% ethanol extract of MMDT on cell viability, apoptosis, and motility in human hepatocarcinoma HepG2 cells. Methods : Cell viability was measured using the CCK-8 assay, and the apoptosis induction was evaluated by caspase-3 activity. To detect apoptotic features, the cells treated with MMDT were stained with 4'-6-diamidino-2-phenylindole (DAPI). Cell motility was examined by Boyden chamber assay and Real-time Cell Index of Migration assay. Gelatin zymography also performed to measure matrix metalloproteinase (MMP)-2/9 activity. Results : We found that MMDT significantly inhibited cell proliferation and increased caspase-3 activity in a dose-dependent manner in HepG2 cells. Apoptotic features such as chromatin condensation and apoptotic bodies were observed in MMDT-treated cells by DAPI staining. MMDT also suppressed PMA-induced cell motility and activities of MMP-2/9. Conclusions : Our results exhibited that MMDT possess the anti-carcinogenetic and anti-metastatic activities via caspase-3 activation and down-regulation of cell motility and invasion in HepG2 cells. Therefore, these findings suggest that MMDT could be potentially applied to the prevention and treatment of cancer.

교모세포종 암줄기세포에 대한 진피 소수성 추출물의 항암 활성 (Anticancer activity of chloroform extract of Citrus unshiu Markovich peel against glioblastoma stem cells)

  • 김유진;심예은;정혜진
    • 한국식품과학회지
    • /
    • 제54권1호
    • /
    • pp.28-34
    • /
    • 2022
  • 본 연구에서는 진피 소수성 추출물(CECU)의 U87MG 교모세포종 암줄기세포에 대한 항암 활성을 확인하였다. 그 결과, CECU는 25-200 ㎍/mL의 농도 범위에서 U87MG 교모세포종 암줄기세포의 증식, 종양구체 형성과 이동능력을 유의적으로 저해하였다. 특히, CECU는 G0/G1기에서 세포주기 정지와 세포사멸을 유도하여 교모세포종 암줄기세포의 증식을 억제할 수 있었다. 게다가, 교모세포종 암줄기세포에 대한 CECU의 항암 활성은 CD133, Oct4, Nanog, Integrin α6, ALDH1A1과 같은 줄기세포능 조절인자들의 발현과 STAT3 신호전달경로를 저해함으로써 유도된 것임을 확인하였다. 마지막으로, CAM assay를 통해 CECU가 U87MG 교모세포종 암줄기세포의 in vivo 종양 형성을 효과적으로 억제함을 입증하였다. 따라서, 본 연구는 진피 소수성 추출물이 주요 stemness marker들의 발현과 핵심 stemness 조절 신호전달경로를 억제함으로써 U87MG 교모세포종 암줄기세포에 대한 항암 활성을 나타냄을 입증하여, 교모세포종의 예방 및 치료를 위한 천연물 소재로서의 활용 가능성을 새롭게 제시하였다.

Monitoring trafficking and expression of hemagglutinin-tagged transient receptor potential melastatin 4 channel in mammalian cells

  • Eun Mi Hwang;Bo Hyun Lee;Eun Hye Byun;Soomin Lee;Dawon Kang;Dong Kun Lee;Min Seok Song;Seong-Geun Hong
    • The Korean Journal of Physiology and Pharmacology
    • /
    • 제27권4호
    • /
    • pp.417-426
    • /
    • 2023
  • The TRPM4 gene encodes a Ca2+-activated monovalent cation channel called transient receptor potential melastatin 4 (TRPM4) that is expressed in various tissues. Dysregulation or abnormal expression of TRPM4 has been linked to a range of diseases. We introduced the hemagglutinin (HA) tag into the extracellular S6 loop of TRPM4, resulting in an HA-tagged version called TRPM4-HA. This TRPM4-HA was developed to investigate the purification, localization, and function of TRPM4 in different physiological and pathological conditions. TRPM4-HA was successfully expressed in the intact cell membrane and exhibited similar electrophysiological properties, such as the current-voltage relationship, rapid desensitization, and current size, compared to the wild-type TRPM4. The presence of the TRPM4 inhibitor 9-phenanthrol did not affect these properties. Furthermore, a wound-healing assay showed that TRPM4-HA induced cell proliferation and migration, similar to the native TRPM4. Co-expression of protein tyrosine phosphatase, non-receptor type 6 (PTPN6 or SHP1) with TRPM4-HA led to the translocation of TRPM4-HA to the cytosol. To investigate the interaction between PTPN6 and tyrosine residues of TRPM4 in enhancing channel activity, we generated four mutants in which tyrosine (Y) residues were substituted with phenylalanine (F) at the N-terminus of TRPM4. The YF mutants displayed properties and functions similar to TRPM4-HA, except for the Y256F mutant, which showed resistance to 9-phenanthrol, suggesting that Y256 may be involved in the binding site for 9-phenanthrol. Overall, the creation of HA-tagged TRPM4 provides researchers with a valuable tool to study the role of TRPM4 in different conditions and its potential interactions with other proteins, such as PTPN6.

Change of Dendritic Cell Subsets Involved in Protection Against Listeria monocytogenes Infection in Short-Term-Fasted Mice

  • Young-Jun Ju;Kyung-Min Lee;Girak Kim;Yoon-Chul Kye;Han Wool Kim;Hyuk Chu;Byung-Chul Park;Jae-Ho Cho;Pahn-Shick Chang;Seung Hyun Han;Cheol-Heui Yun
    • IMMUNE NETWORK
    • /
    • 제22권2호
    • /
    • pp.16.1-16.20
    • /
    • 2022
  • The gastrointestinal tract is the first organ directly affected by fasting. However, little is known about how fasting influences the intestinal immune system. Intestinal dendritic cells (DCs) capture antigens, migrate to secondary lymphoid organs, and provoke adaptive immune responses. We evaluated the changes of intestinal DCs in mice with short-term fasting and their effects on protective immunity against Listeria monocytogenes (LM). Fasting induced an increased number of CD103+CD11b- DCs in both small intestinal lamina propria (SILP) and mesenteric lymph nodes (mLN). The SILP CD103+CD11b- DCs showed proliferation and migration, coincident with increased levels of GM-CSF and C-C chemokine receptor type 7, respectively. At 24 h post-infection with LM, there was a significant reduction in the bacterial burden in the spleen, liver, and mLN of the short-term-fasted mice compared to those fed ad libitum. Also, short-term-fasted mice showed increased survival after LM infection compared with ad libitum-fed mice. It could be that significantly high TGF-β2 and Aldh1a2 expression in CD103+CD11b- DCs in mice infected with LM might affect to increase of Foxp3+ regulatory T cells. Changes of major subset of DCs from CD103+ to CD103- may induce the increase of IFN-γ-producing cells with forming Th1-biased environment. Therefore, the short-term fasting affects protection against LM infection by changing major subset of intestinal DCs from tolerogenic to Th1 immunogenic.

Antiproliferative Activity of Piceamycin by Regulating Alpha-Actinin-4 in Gemcitabine-Resistant Pancreatic Cancer Cells

  • Jee-Hyung Lee;Jin Ho Choi;Kyung-Min Lee;Min Woo Lee;Ja-Lok Ku;Dong-Chan Oh;Yern-Hyerk Shin;Dae Hyun Kim;In Rae Cho;Woo Hyun Paik;Ji Kon Ryu;Yong-Tae Kim;Sang Hyub Lee;Sang Kook Lee
    • Biomolecules & Therapeutics
    • /
    • 제32권1호
    • /
    • pp.123-135
    • /
    • 2024
  • Although gemcitabine-based regimens are widely used as an effective treatment for pancreatic cancer, acquired resistance to gemcitabine has become an increasingly common problem. Therefore, a novel therapeutic strategy to treat gemcitabine-resistant pancreatic cancer is urgently required. Piceamycin has been reported to exhibit antiproliferative activity against various cancer cells; however, its underlying molecular mechanism for anticancer activity in pancreatic cancer cells remains unexplored. Therefore, the present study evaluated the antiproliferation activity of piceamycin in a gemcitabine-resistant pancreatic cancer cell line and patient-derived pancreatic cancer organoids. Piceamycin effectively inhibited the proliferation and suppressed the expression of alpha-actinin-4, a gene that plays a pivotal role in tumorigenesis and metastasis of various cancers, in gemcitabine-resistant cells. Long-term exposure to piceamycin induced cell cycle arrest at the G0/G1 phase and caused apoptosis. Piceamycin also inhibited the invasion and migration of gemcitabine-resistant cells by modulating focal adhesion and epithelial-mesenchymal transition biomarkers. Moreover, the combination of piceamycin and gemcitabine exhibited a synergistic antiproliferative activity in gemcitabine-resistant cells. Piceamycin also effectively inhibited patient-derived pancreatic cancer organoid growth and induced apoptosis in the organoids. Taken together, these findings demonstrate that piceamycin may be an effective agent for overcoming gemcitabine resistance in pancreatic cancer.

녹차의 폴리페놀류인 에피갈로카테킨-3-갈레이트에 의한 항노화, 항비만 및 항암효과에 대한 비교 분석 (Comparative Analysis on Anti-aging, Anti-adipogenesis, and Anti-tumor Effects of Green Tea Polyphenol Epigallocatechin-3-gallate)

  • 임은지;김민재;김현지;이성호;전병균
    • 생명과학회지
    • /
    • 제28권10호
    • /
    • pp.1201-1211
    • /
    • 2018
  • 본 연구에서는 다양한 사람의 암세포주(SNU-601, MKN74, AGS, MCF-7, U87-MG 및 A-549)와 정상세포주 [MRC-5 섬유아세포, 사랑니 유래 중간엽 줄기세포(DSC), 3T3-L1 생쥐의 지방전구세포]에 녹차에 포함되어 있는 epigallocatechin-3-gallate (EGCG)를 처리하여 세포 증식, 세포 노화, 지방세포로의 분화, 말단소립복원효소 활성과 암세포의 전이 능력 등을 검증하여 항노화, 항비만 및 항암 효과를 서로 비교 조사하였다. MTT 분석에서 다양한 암세포주는 정상세포주보다 유의적으로 낮은 반억제농도값을 나타내었다. 10 uM의 EGCG가 포함된 배양액에서 정상체세포인 MRC-5와 DSC를 5 계대배양한 결과 세포증식 및 세포 노화에 큰 변화를 관찰하지 못하였고, 3T3-L1 생쥐의 지방전구세포를 지방분화 배양액에 EGCG를 첨가하여 지방세포로의 분화 억제를 유도하였지만 지방세포로의 분화를 역시 억제하지 못하였다. 그러나 여러 다양한 암세포주에 10 uM의 EGCG가 포함된 배양액에 배양한 결과 암세포의 세포증식 억제, 세포노화 유도, 말단소립복원효소 활성과 암세포의 전이 능력이 현저히 감소됨을 관찰하여 EGCG는 항노화나 항비만 효과보다는 항암효과에 더 효율적인 것으로 관찰되었고, 적당한 농도에서 잠재적인 항암물질로의 한 종류로 판단된다.

Insulin-like growth factor-I 이 치주인대세포의 생물학적 활성도에 미치는 영향에 대한 연구 (THE STUDY ON THE EFFECTS OF THE INSULIN-LIKE GROWTH FACTOR-I ON THE BIOLOGICAL ACTIVITY OF THE HUMAN PERIODONTAL LIGAMENT CELLS)

  • 김성진;이재목;서조영
    • Journal of Periodontal and Implant Science
    • /
    • 제24권2호
    • /
    • pp.219-237
    • /
    • 1994
  • 치주조직재생에 중요하게 생각되는 요건으로는 치근면의 상태, 전구세포의 증식, 치유 부의 상피조직배제, 치유부의 안정화를 들 수 있으며 이중 가장 중요한 요건중의 하나가 치유부에 치주조직재생을 도모할 수 있는 전구 세포가 실수부로 이주하여 부착과 증식, 분화를 통하여 교원질섬유를 포함한 결체조직의 부착과 백악질, 골조직을 재형성하는 것이다. 최근에 이러한 전구세포들을 자극하고 원치 하는 세포들을 저지하기 위한 방법으로 성장 인자에 대한 연구가 활발히 진행되고 있다 골조직을 조절하는 인자로 알려진 인슐린유사성장인자- I (Insulin-like growth factor-I)는 폴리펩타이드계 성장인자로서 골세포의 증식, 기질합성 등을 촉진시킨다고 보고되고 있으나, 치주조직 재생에 대한 IGF- I 의 영향을 잘 규명되어 있지 않으므로 배양된 치주인대세포에 IGF- I 을 농도별로 주입하여 세포의 증식능, 교원질 및 단백질 합성능, 알카린인산효소활성도를 측정해 보므로써 IGF- I 이 치주인대세포의 활성에 미치는 영향을 알아보고자 하였다. 교정치료를 위해 내원한 환자로부터 건강한 제일소구치를 발거하여 치주인대세포를 분리, 배양하여 IGF- I 을 주입시키지 않은 군을 대조군으로 하고, IGF- I 을 각각 0.1, 1, 10, 100 ng//ml로 주입시킨 군을 실험군으로 하여 DNA합성능, 총단백질과 교원질 합성능 및 알카린인산효소활성도를 측정하여 다음과 같은 결과를 얻었다. DNA 합성능에 미치는 IGF- I 의 효과는 농도가 증가함에 따라 0.1ng/ml를 제외하고는 DNA 합성능이 증가하는 경향을 보였고, 대조군에 비해 10, 100ng/ml투여군에서 통계적으로 유의한 차이(P<0/05)를 나타내었다. 치주인대세포의 총단백질 합성양에 미치는 IGF- I 의 효과는 농도가 증가함에 따라 총단백질 합성양이 증가하는 경향을 보였으며, 대조군에 비해 1, 10, 100ng/ml 투여군에서 통계학적으로 유의한 차이(P<0.001)를 나타내었다. 총단백질을 교원질(collagenase digestible protein : CDP)과 비교원성 단백질(non-collagenous protein : NCP)로 분류하여 비교하였을때 IGF- I 의 농도가 증가함에 따라 비교원성 단백질 합성양과 교원질 합성양이 증가하는 경향을 보였으며, 비교원성 단백질 합성양이 교원질 합성양보다 약간 높게 나타났고, 대조군에 비해 1, 10, 100ng/ml 투여군에서 통계적으로 유의한 차이(P<0.05, P<0.001)를 나타내었다. 총단백질에 대한 교원질합성의 상대적 비율은 농도가 증가함에 따라 각 군당 별차이를 보이지 않았으며, 대조군에 비해 통계적으로 유의한 차이 (P>0.05)를 나타내지 않았다. 알카린인산효소활성도에 미치는 IGF- I 의 효과는 모든군에서 7일째보다 14일째에서 약간 높은 알카린인산효소활성도롤 나타내었으며, 7, 14일 모두 농도가 증가함에 따라 효소활성도가 증가하였으며, 7일째 대조군에 비해 100ng/ml 투여군에서 통계적으로 유의한 차이(p<0.05)를 나타내었다.

  • PDF