• 沒有找到結果。

ȐΜΒȑġ Gelatin zymography

5. Gelatin gelǺ

2.5% Triton-100] ࠻ྕΠϸᔈ 30 ϩដǴӆܫΕ Tris-HCl (50mMǴ PH=7.5)ύమࢱٿԛǴ΋ԛ 15 ϩដǴҞӦӧܭࡠൺ MMPs ޑࢲ܄Ƕ

ஒጤܫΕ develop buffer composition buffer ύܭ 370CǴ50 rpm ޑ

୻ᎦጃϣǴऊ 15 λਔࡕǶጤҔ coomassie blue ࢉՅऊ΋λਔࡕӆ٬Ҕ

coomassie blue destain buffer ଏډёа࣮ޑډ band ջё࠾ጤǶ

ȐΜΟȑġ ಍ीϩ݋

ೀ౛ಔᆶ௓ڋಔޑኧᏵ໔Ǵ߯௦Ҕ Student’s t-testǴp<0.05Ǵղۓ

ࢂցԖ಍ी΢ৡ౦ǴኧᏵ่݀а Mean±S.M. ߄ҢӚ໨ኧᏵǶ

ಃѤക ่݀

΋ǵġ CCN3 ཮ߦ຾Γᜪ೬ମԺዦಒझޑ౽୏܄

΋૓ᕎੱಒझ཮ӃԖ౽ՉޑૈΚϐࡕǴω཮຾Չᙯ౽բҔ (Metastasis)Ǵҗܭ CCN3 ڀԖፓ࿯ಒझମࢎޑख़ಔᆶߦ຾ځдᕎ ಒझޑ౽୏ૈΚǴӢԜ௢՗ CCN3 ёૈ཮ׯᡂಒझޑ౽Չ܄Ǵჴ ᡍޑҞӦࣁೀ౛όӕޑᐚࡋޑ CCN3 (0Ǵ10Ǵ30Ǵ100 ng/ml) ࡕǴ ճҔ transwell migration assay ӧڰۓਔ໔ (16 λਔ) ᢀჸ CCN3 ჹܭΓᜪ೬ମԺዦಒझԖค౽୏܄Ǵ่݀ว౜ӧೀ౛ 30 ng/ml ޑ ᐚࡋਔಒझޑ౽୏௃׎നࣁᡉ๱ (Fig. 6A)ǶԶԖЎ᝘ࡰр CCN3

཮׭ڋᕎಒझғߏ (Poliferation)ǴӢԜӧҁჴᡍύ٬Ҕ MTT assay ѐୀෳ CCN3 ჹܭΓᜪ೬ମԺዦಒझޑቚғำࡋаϷዴᇡ ಒझޑ౽୏܄ǴԶҗჴᡍ่݀ว౜όӕޑ CCN3 ᐚࡋჹܭΓᜪ೬ ମԺዦಒझޑӸࢲ౗٠ؒԖ಍ी΢ޑཀကǴ߄ҢΑ CCN3 ཮ߦ຾

Γᜪ೬ମԺዦಒझޑ౽୏܄ǴՠόቹៜಒझӸࢲ౗(Fig. 6B)Ƕ

Βǵġ CCN3཮೷ԋΓᜪ೬ମԺዦಒझϐ MMP-13 ޑεໆ߄౜

ಒझޑᙯ౽܄کಒझ܌ϩݜޑ MMPs ӸԖࡐεޑᜢᖄ܄Ǵ܌

а ӧ ჴ ᡍ ύ ٬ Ҕ Α RT-PCR ǵ Western blotting а Ϸ gelatin-zymographyϩ݋ಒझ܌ϩݜϐ MMP ޑ߄౜ໆаϷࢲ܄Ǵ

ᢀჸӧೀ౛ CCN3 ࡕࢂց཮ቹៜಒझϩݜ MMP ϷᅿᜪǶԖЎ᝘

ࡰрӧΓᜪޑᕎੱಒझύځ MMP -1ǵ-2ǵ-3ǵ-9 ک-13 ޑ߄౜ᆶ ဍዦൾ܄ำࡋϷᙯ౽բҔԖᜢ (Egeblad and Werb, 2002; Tan et al., 2009)Ƕ܌аჴᡍӃа RT-PCR ѐᑔᒧځ MMP -1ǵ-2ǵ-3ǵ-9 ک-13 ޑ߄౜Ǵว౜྽а CCN3 ೀ౛Γᜪ೬ମᕎ 24 λਔϐࡕǴа MMP-13 mRNA ޑ߄౜ໆനࣁᡉ๱ (Fig. 7A)Ƕௗ๱ೀ౛ CCN3 όӕਔ໔ࡕ (0ǵ6ǵ12ǵ24 λਔ) ࡕǴ٬Ҕ Western blotting Ϸ gelatin-zymography ޑБݤᢀჸ MMP-13 ೈқ፦߄౜ᆶࢲ܄Ǵ่݀ࡰр MMP-13 ೿Ԗ time-dependent ޑ౜ຝ (Fig. 7B)ǶନԜϐѦǴךॺ׳຾΋؁ޑ٬

Ҕ MMP-13 si-RNA ٰຓܴ MMP-13 ࢂЬाቹៜΓᜪ೬ମԺዦಒ झޑ౽୏܄ (Fig. 7C)Ǵௗ๱٬ҔՋБᏀᗺݤຓܴǴᙯࢉ MMP-13 si-RNA Ԗԋф (Fig. 7D)Ƕҗ่݀ࡰр CCN3 ёа೷ԋΓᜪ೬ମ Ժዦಒझౢғ MMP-13 ຾Զ೷ԋಒझޑ౽୏܄Ƕ

Οǵġ CCN3೸ၸ Įvȕ3 Ϸ Įvȕ5 integrin receptor ೷ԋΓᜪ೬ମԺዦ ಒझ౽Չ

Ў᝘ࡰр CCN3 ཮೸ၸ Į5ȕ1ǵĮvȕ3 Ϸ Įvȕ5 integrin receptor

ำύǶ२Ӄ٬Ҕ Į5ȕ1ǵĮvȕ3 Ϸ Įvȕ5 ޑלᡏ 30 ϩដϐࡕǴӆу Ε CCN3Ǵ24 λਔࡕԏ໣ಒझճҔ Western blotting ᢀჸ MMP-13 ޑೈқ፦߄౜Ǵว౜ಒझऩӃೀ౛ Įvȕ3 Ϸ Įvȕ5 ޑלᡏࡕ཮׭ڋ CCN3 ౢғ MMP-13 (Fig 8A)Ƕќ΋Бय़٬Ҕ migration assay Ϸ RT-PCR ϩ݋ǴӕኬӃӧಒझύೀ౛ Į5ȕ1ǵĮvȕ3 Ϸ Įvȕ5 ޑלᡏ 30 ϩដϐࡕǴӆуΕ CCN3Ǵӧ migration assay ޑ่݀ύว౜Ӄ

ೀ౛ Įvȕ3 Ϸ Įvȕ5 לᡏޑಒझ౽ՉૈΚ཮ܴᡉΠफ़ (Fig. 8B)Ǵ ќѦ RT-PCR ޑ่݀ΨᡉҢ྽ಒझೀ౛ Įvȕ3 Ϸ Įvȕ5 לᡏࡕǴ೷

ԋ MMP-13 ޑ߄౜ໆܴᡉΠफ़ (Fig. 8C)ǴќѦҗܭ integrin Ьा

ᙖҗᒣ᛽ ligand ΢ޑ RGD (Arg-Gly-Asp) ׇӈԶ଺่ӝǴᚐѦ

٬Ҕ RGD peptide уаዴᇡǴҗܭѬёаߔᘐ integrin ᆶ ligand ޑ่ӝǶԶ RGD ёаߔᘐ CCN3 ܌ቚу MMP-13 ߄౜Ǵՠ RAD

ؒԖԜբҔ (Fig. 8C)Ƕᆕӝа΢่݀ளޕ CCN3 ߦ຾Γᜪ೬ମ Ժዦಒझ౽Չᆶϩݜ MMP-13 ࢂ೸ၸ Įvȕ3 Ϸ Įvȕ5 integrin receptorǶ

Ѥǵġ FAKୖᆶӧΓᜪ೬ମԺዦಒझ౽Չύ

Ў᝘ࡰр Focal adhesion kinase (FAK) ࢂ΋ᅿӸܭಒझ፦ύ ޑ non-receptor protein tyrosine kiaseǴϩηໆεऊࣁ 125kDaǴ྽

ಒझ࿶җ integrin ߕ๱ܭಒझѦ୷፦ೈқޑਔࡕǴFAK ཮ࡐזޑ

೏ᐟࢲǴ຾Զᆶځдૻ৲ϩηբҔǴӢԜ FAK ೏ᇡࣁӧ integrin

܌ፓ࿯ޑૻ৲໺ሀၸำύǴתᄽख़ाޑفՅǶ٬Ҕ Western blotting ᢀჸ๏ϒ CCN3 ڈᐟ࿶ၸόӕޑਔ໔ (0ǵ10ǵ15ǵ30ǵ60ǵ120 ϩដ) ځ FAK (tyr397) ޑࢲ܄Ǵว౜ FAK ޑᕗለϯࢂอኩ܄ޑǴ εऊӧ 10 ϩដډ 30 ϩដϐ໔ၲډଯঢ়ࡕǴӧ΋λਔߡזೲΠफ़ (Fig. 9A)ǶԜѦᙯࢉΓᜪ೬ମԺዦಒझ FAK si-RNA ک FAK mutant 24 λਔࡕуΕ CCN3 ڈᐟǴճҔ migration assay аϷ RT-PCR ޑ Бݤϩ݋ (Fig. 9Bǵ9C)Ǵ೿ёᢀჸډΓᜪ೬ମԺዦಒझޑ౽Չૈ

Κᆶ MMP-13 ޑౢғ೿Ԗܴᡉޑ׭ڋբҔǶவ่݀ύளޕ FAK ޑࢲϯୖᆶӧ CCN3 ޑբҔύǶ

ϖǵġ PI3K/AktୖᆶӧΓᜪ೬ମԺዦಒझ౽Չύ

җ integrin ܌ፓ࿯ޑૻ৲໺ሀၡ৩Ԗ PI3K/Akt ܌ୖᆶǴ܈ࢂ

ځдၡ৩ӵǺERKǵJNK Ϸ MEK/MAPKǶ܌а΋໒ۈךॺӃ٬

Ҕ Western blotting ᢀჸӧ๏ϒಒझ CCN3 ࡕځၡ৩ೈқޑᕗለϯ ߄౜Ƕ྽๏ϒΓᜪ೬ମᕎಒझ CCN3Ǵ10 ϩដϐࡕǴPI3K ޑᕗለ ϯԖᡉ๱ޑቚу (Fig. 10A)ǴӢԜӃ๱ख़ӧ PI3K/Akt ೭చၡ৩Ƕ

Ϸ RT-PCRǴёᢀჸډΓᜪ೬ମԺዦಒझޑ౽ՉૈΚᆶ MMP-13 ޑౢғ೿Ԗܴᡉޑ׭ڋբҔ (Fig. 10Bǵ10Cǵ10Dǵ10E)ǶӢԜ PI3K ࢲϯୖᆶӧ CCN3 ϐբҔύǶௗΠٰ૸௖ Akt ࢂցΨୖᆶӧ ځύǴ຾΋؁๏ϒಒझ Akt ޑ׭ڋᏊ (Akt inhibitor) 30 ϩដǴ܈

ࢂᙯࢉ Akt mutant 24 λਔࡕǴ٬Ҕ migration assay Ϸ RT-PCR ᢀ ჸډΓᜪ೬ମԺዦಒझޑ౽ՉૈΚᆶ MMP-13 ޑౢғ೿Ԗܴᡉޑ

׭ڋբҔ (Fig. 11Bǵ11Cǵ11Dǵ11E)ǶӢԜ Akt ࢲϯୖᆶӧ CCN3 ϐբҔύǶ

Ϥǵġ NF-țB ୖᆶӧҗ CCN3 ፓ௓ቚуΓᜪ೬ମԺዦಒझ౽Չύ

ϐ߻ޑࣴزࡰр྽ CCN family ӧᇨวಒझᙯ౽ਔ཮೸ၸ NF-țB ᙯᒵӢη (Lin et al., 2004)ǶӧԜࣁΑ௖૸Γᜪ೬ମԺዦ ಒझࢂց཮ჹ CCN3 ܌ᇨวޑ NF-țB ౢғፓ௓բҔǴ२Ӄ٬Ҕ Western blotting ᢀჸӧ๏ϒಒझ CCN3 ڈᐟ࿶ၸόӕޑਔ໔ (0ǵ10ǵ15ǵ30ǵ60ǵ120 ϩដ) ࡕځ IKKĮ/ȕǵIțB ೈқ፦ޑᕗ ለϯ߄౜Ǵჴᡍ่݀ࡰрځᕗለϯޑ߄౜Ԗև౜ time-dependent ޑ౜ຝ (Fig. 12C)Ƕௗ๱๏ϒಒझ NF-țB inhibitor (PDTCǵTPCK Ϸ NF-țB inhibitor peptide) 30 ϩដǴ܈ࢂ٬Ҕᙯࢉ IKKĮ Ϸ IKKȕ mutant 24 λਔࡕǴճҔ migration assay Ϸ RT-PCR ᢀჸǴว౜྽

ೀ౛ NF-țB ׭ڋᏊᆶ mutant ਔǴΓᜪ೬ମԺዦಒझޑ౽ՉૈΚ ᆶ MMP-13 ޑౢғ೿Ԗܴᡉޑ׭ڋբҔ (Fig. 12Aǵ12Bǵ12Dǵ 12E)Ƕ׳຾΋؁ஒΓᜪ೬ମԺዦಒझᙯࢉΕ țB-luciferase ྽բ NF-țB ࢲ܄ޑࡰ኱ӢηǴҗჴᡍ่݀ᡉҢǴ྽ಒझೀ౛ PI3K inhibitor (Ly294002 Ϸ wortmannin) ǵ Akt inhibitor ک NF-țB inhibitor (PDTCǵTPCK Ϸ NF- țB inhibitor peptide) ೿ૈफ़եҗ CCN3 ܌ᇨวޑ NF-țB ࢲ܄ (Fig. 13Aǵ13B)ǶќѦǴஒΓᜪ೬ ମዦಒझ΋ӕᙯࢉΕ p85ǵAktǵIKKDǵIKKȕ mutant Ψૈ׭ڋ NF-țB ᙯᒵӢηޑࢲ܄Ƕᆕӝа΢ޑ่݀ளޕ NF-țB ୖᆶӧ

CCN3 ፓ௓Γᜪ೬ମԺዦಒझޑၡ৩ύǶ

ಃϖക ૸ፕ

ဍዦಒझ཮ᙖҗϩݜMMPsǴ٬ளဍዦಒझ཮ऀၸಒझѦ୷፦Ǵ ᒿ๱Ոన܈రЃس಍ߟΕيᡏځд೽Տޑಔᙃ܈Ꮤ۔ (Bremnes et al., 2002; Page-McCaw et al., 2007) ࡕǴဍዦಒझ཮εໆቚғ೷ԋ҅தಒ झคݤளډкىޑᎦϩԶᏤԿ҅தಔᙃᏔ۔ޑфૈ෧১Ǵ೭Ψࢂ೷ԋ ᕎੱੰΓԝΫޑख़ाӢનϐ΋Ƕ೬ମԺዦڀԖᙯ౽ޑወӧૈΚǴу΢

೬ମԺዦჹܭϯᏢ܈ܫᕍޑݯᕍਏ݀٠όӳǴаϷલЮԖਏޑᇶշᕍ ݤǴ٬ளεӭኧޑ೬ମԺዦੰΓႣࡕૈΚৡǵ׳཮ԖൺวϷᙯ౽ޑё

ૈ܄ǶӢԜऩૈவύᕕှ೬ମԺዦᙯ౽ၸำޑϩηᐒڋǴ܈೚ёаග ٮ҂ٰᜢܭݯᕍ೬ମԺዦᙯ౽ϐԖਏБݤ (Fong et al., 2007)ǶЎ᝘ࡰ

рӧΓᜪޑᕎੱಒझύځMMP-1ǵ-2ǵ-3ǵ-9ک-13ޑ߄౜ᆶဍዦൾ܄

ำࡋϷ࣬ᜢᙯ౽բҔԖᜢǶӢԜҁჴᡍޑҞӦӧܭ௖૸Γᜪ೬ମԺዦ ಒझᙯ౽ޑᐒڋၡ৩Ǵ׳຾΋؁ޑ૸ፕࢂٗ΋ᅿޑMMPୖᆶӧځ ύǴҗჴᡍ่݀ளޕǴCCN3཮೷ԋΓᜪ೬ମԺዦಒझౢғεໆޑ MMP-13ǶMMP-13ࢂᜢ࿯੯ੰύᏤԿ೬ମଏϯޑख़ाӢηϐ΋ǴԶ

྽೬ମр౜ୢᚒਔǴёૈ཮೷ԋӭᅿޑମᓝ੯ੰǴԶځύϣғ܄೬ମ ዦᗋԖёૈ཮ൾ܄ᙯϯࣁ೬ମԺዦ (Yu et al., 2003)Ƕ܌аךॺᇡࣁ MMP-13ޑфૈନΑૈ୼ߦ຾ᕎಒझޑ౽୏ѦǴᗋёૈ཮೷ԋڬൎ҅

தޑ೬ମಒझᖿܭൾϯ׎ԋᕎಒझǶԶࣴزMMPନΑёаᔅշᕕှ

ဍዦวғޑၸำѦǴ׆ఈёаவύѐࣴز໒วр׭ڋMMPբҔޑᛰ ނٰݯᕍᕎੱੰΓǴ܈೚೭཮ࢂफ़եੰΓᕎੱൺวϷᙯ౽ޑёૈ܄Ƕ

ӧӃ߻ޑࣴزύว౜CCN3཮߄౜ӧ҅தಔᙃǴхࡴ๝Ǵઓ࿶س

಍ǴޤǴԼԺǴ೬ମǴՠӧဍዦಒझύޑ߄౜ᗲϿࣁΓޕ (Manara et al., 2002)Ƕу΢ԖࣽᏢৎȐRudolf Virchowȑ ࡰрᕎಒझନΑԾيڀ ഢޑ೭٤ૈΚѦǴΨ཮ڙډຼᎁಒझϩݜޑಒझᐟનǵϯᏢᐟન܈ғ ߏӢηٰᇨ٬Ѭॺӛᕎಒझᆫ໣ (Coussens and Werb, 2002; DeNardo and Coussens, 2007)Ǵ٠٬Ѭॺ߄౜߄౜рԖճܭဍዦғߏǵᙯ౽ޑ

׎ᄊǴ຾Զബ೷р΋ঁ፾ӝဍዦғߏޑ༾ᕉნ (Joyce and Pollard, 2009)ǶҗܭCCN fmailyёа྽଺integrin receptorޑligandǴ่ӝϐࡕ ёаॄೢፓ௓ಒझ໔܈ಒझᆶಒझѦ୷፦ޑբҔǴௗ๱ቹៜಒझମࢎ

׎ᄊǵፓ௓ಒझғߏǵϩϯǵ౽୏ǵߕ๱Ϸ໾αޑঅൺǴӢԜךॺགྷ ޕၰCCN3ࢂց཮೸ၸintegrin receptorٰ೷ԋΓᜪ೬ମԺዦಒझޑ౽

୏܄аϷCCN3ᆶintegrin receptorޑᜢ߯Ƕ२ӃךॺӃࢂаtranswell

ٰዴۓӧೀ౛CCN3ࡕΓᜪ೬ମԺዦಒझޑ౽୏܄Ǵ٠ճҔೀ౛

integrin receptorޑלᡏளډޑ่݀ࣁCCN3೸ၸĮvȕ3ϷĮvȕ5 integrin

sarcomaکosteosarcomaύǴႣࡕၨৡޑࡰ኱Ӣη (Perbal et al., 2009;

Perbal et al., 2008)ǴନԜϐѦӧChronic Myeloid Leukaemia (CML) Ϸ

໵Յનዦ (Melanoma) ύǴCCN3Ԗ೏down-regulatedޑ౜ຝǴځфૈ

ӧܭफ़եဍዦಒझޑߟҍૈΚᆶϩݜMMPsೈқ፦܈ࢂቚу঒Ϋբ ҔǴԖᗺᜪ՟ဍዦ׭ڋӢηޑفՅ(Fukunaga-Kalabis et al., 2008;

McCallum et al., 2009)ǴฅԶӧମᕎಒझٯӵEwing's sarcomaύ཮ᢀჸ ډCCN3ڀԖߦ຾ဍዦޑ౽ՉϷߟҍૈΚǴᆕӝа΢ޑፕᗺёаޕ p85 mutantǵAkt mutantǵIKKD mutant Ϸ IKKȕ mutantࡕǴ೿཮׭ڋ CCN3ڈᐟΓᜪ೬ମԺዦಒझޑ౽ՉૈΚᆶMMP-13ޑౢғǶќ΋Б

य़٬ҔRGD peptide ϷRAG peptideว౜RGD཮׭ڋMMP-13ޑౢ

ғǴՠ๏ϒRAG peptideਔؒԖᡉ๱ޑৡ౦Ǵ٠ଛӝ٬ҔհӀሇનࢲ

܄ෳۓᢀჸ׭ڋᏊᆶmutantჹܭಒझϣNF-țBޑࢲ܄Ǵว౜྽ೀ౛׭

ڋᏊᆶmutantਔ೿཮फ़եNF-țBޑࢲ܄Ƕ೭٤่݀ࡰрCCN3཮࿶ၸ Įvȕ3ϷĮvȕ5 integrin receptorፓ௓Γᜪ೬ମԺዦಒझޑ౽Չᆶϩݜ MMP-13Ǵࢂ೸ၸPI3K/Akt/NF-țB೭చၡ৩ (Fig. 14)Ƕ

ಃϤക ่ፕ

ᆕӝа΢ޑჴᡍ่݀ǴёаளډCCN3࿶җĮvȕ3ϷĮvȕ5 integrin receptor۳Π໺ሀૻ৲ǴࢲϯΠෞPI3K/Akt/NF-țB೭చၡ৩ፓ௓Γᜪ ೬ମԺዦಒझϩݜMMP-13Ǵ຾Զፓ௓Γᜪ೬ମዦಒझޑ౽ՉૈΚǶ

ୖԵЎ᝘

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angiogenesis and tumor metastasis. Biochim Biophys Acta 1032, 89-118.

Cary, L.A., Chang, J.F., and Guan, J.L. (1996). Stimulation of cell migration by overexpression of focal adhesion kinase and its association with Src and Fyn. J Cell Sci 109 ( Pt 7), 1787-1794.

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Fig 6. CCN3 induced the migration activity of human chondrosarcoma cells.

JJ012 cells were incubated with various concentrations of CCN3, and in vitro migration activities measured with the Transwell after 24 h showed that CCN3 (30 ng/ml) increased cell migration significantly (A). JJ012 cells sere stimulated by indicated concentraction intervals (0 ,10, 30 and 100 ng/ml) and proliferation was determined by MTT assay (B). Results are presented as Mean±S.E. (n=3). * p<0.05 was compared with control.

Fig 7. CCN3-directed migration activity of human chondrosarcoma cells involves upregulation of MMP-13.

JJ012 cells were incubated with CCN3 (30 ng/ml) for 24h or for indicated time intervals, cell lysates were then collected and the mRNA level of MMP-1, -2, -3, -9 and -13 was determined using qPCR (A). Cells were incubated with CCN3 (30 ng/ml) for indicated time intervals .The cultured medium and cell lysates were then collected. Both the protein level of MMP-13 in cell lysates determined by Western blot analysis and the enzyme activity of MMP-13 in cell lysates and supernatant determined using zymography were increased in a time-dependent manner (B). Cells were transfected with MMP-13 or control siRNA for 24 h,and in vitro migration was measured with the Transwell after 24 h (C) Cells were transfected with MMP-13 or control siRNA for 24 h, and the mRNA and protein levels of MMP-13 were examined using Western blot analysis (D). Results are presented as Mean±S.E. (n=3). * p<0.05 was compared with control. #p<0.05 was compared with CCN3.

Fig 8. CCN3 increased human chondrosarcoma cells migration and MMP-13 expression through Įvȕ3 and Įvȕ5 integrin receptor.

JJ012 cells were pretreated with Į5ȕ1ǵĮvȕ3 or Įvȕ5 antibody (5 ȝg/ml) after treating with CCN3 (30 ng/ml) for 24h, and MMP-13 expression was determined by Western blot analysis (A). JJ012 cells were pretreated with Įvȕ3 mAb (5 ȝg/ml), Įvȕ5 mAb (5 ȝg/ml) cyclic RGD (10 nM) and cyclic RAD (10 nM) for 30 min followed by stimulation with CCN3 (30 ng/ml). The in vitro migration activity measured after 24 h showed that Įvȕ3 mAbǵĮvȕ5 mAb could inhibit the cell migration (C). The qPCR result show that Įvȕ3 mAb, Įvȕ5 mAb and cyclic RGD but not Į5ȕ1 mAb and cyclic RAD could inhibit the MMP-13 expression (C). Results are presented as Mean±S.E. (n=3). * p<0.05 was compared with control.

#p<0.05 was compared with CCN3.

Fig 9. Involvement of FAK-signaling pathway in response to CCN3 in chondrosarcoma cells.

(A) JJ012 cells were incubated with CCN3(30 ng/ml) for indicated time intervals, and p-FAK expression was determined by Western blot analysis.

Note that CCN3 activated the FAK pathway in JJ012 cells. (B) Cells were transfected with mutant and siRNA of FAK for 24 h followed by stimulation with CCN3 (30 ng/ml), and in vitro migration was measured with the Transwell after 24 h. (C) JJ012 cells were transfected with mutant of FAK for 24 h followed by stimulation with CCN3 (30 ng/ml), and the mRNA level of MMP-13 were determined by using qPCR.

Results are presented as mean±S.E. (n=3). * p<0.05 was compared with control.#p <0.05 was compared with CCN3.

Fig 10. PI3K is involved in CCN3-mediated human chondrosarcoma migration and MMP-13 expression.

JJ012 cells were incubated with CCN3 (30 ng/ml) for indicated time intervals, and p-PI3K expression was determined by Western blot analysis (A). JJ012 cells were pretreated with Ly294002 (10PM) and wortmannin (10PM) for 30 min followed by stimulation with CCN3 (30 ng/ml) for 24 h, and in vitro migration was measured with the Transwell after 24 h (B). JJ012 cells were pretreated with Ly294002 (10PM) and wortmannin (10PM) for 30 min followed by stimulation with CCN3 (30 ng/ml) for 24 h, and the mRNA level of MMP-13 were determined by using qPCR (C). Cells were transfected with mutant of PI3K (p85) for 24 h followed by stimulation with CCN3 (30 ng/ml), and in vitro migration was measured with the Transwell after 24 h (D). JJ012 cells were transfected with mutant of PI3K (p85) for 24 h followed by stimulation with CCN3 (30 ng/ml), and the mRNA of MMP-13 were determined by using qPCR (E). Results are presented as mean±S.E. (n=3). * p<0.05 was compared with control. #p <0.05 was compared with CCN3.

Fig 11. Akt is involved in CCN3-mediated human chondrosarcoma migration and MMP-13 expression.

JJ012 cells were incubated with CCN3 (30 ng/ml) for indicated time intervals, and p- Akt expression was determined by Western blot analysis (A). JJ012 cells were pretreated with Akt inhibitor (10 PM) for 30 min followed by stimulation with CCN3 (30 ng/ml) for 24 h, and in vitro migration was measured with the Transwell after 24 h (B). JJ012 cells were pretreated with Akt inhibitor (10PM) for 30 min followed by stimulation with CCN3 (50 ng/ml) for 24 h, and the mRNA level of MMP-13 were determined by using qPCR (C). Cells were transfected with p85 mutant for 24 h followed by stimulation with CCN3 (30 ng/ml), and in vitro migration was measured with the Transwell after 24 h (D).

JJ012 cells were transfected with p85 mutant for 24 h followed by stimulation with CCN3 (30 ng/ml), and the mRNA of MMP-13 were determined by using qPCR (E). Results are presented as Mean±S.E. (n=3).

* p<0.05 was compared with control. #p<0.05 was compared with CCN3.

Fig 12. NF-țB involved in CCN3-mediated human chondrosarcoma migration and MMP-13 expression.

JJ012 cells were pretreated with NF-țB inhibitor [PDTC (10 PM)ǵTPCK (3 PM), and NF-țB inhibitor peptide (10 PM)] for 30 min followed by stimulation with CCN3 (30 ng/ml) for 24 h, and in vitro migration was measured with the Transwell after 24 h (A). JJ012 cells were pretreated with NF-țB inhibitor [PDTC (10 PM)ǵTPCK (3 PM), and NF-țB inhibitor peptide (10 PM)] for 30 min followed by stimulation with CCN3 (30 ng/ml) for 24 h, and the mRNA level of MMP-13 were determined by using qPCR (B). JJ012 cells were incubated with CCN3 (30 ng/ml) for indicated time intervals, and pIKKĮ/ȕ, p-IțB and p-p65 expression was determined by Western blot analysis (C). Cells were transfected with mutant of IKKĮ and IKKȕ for 24 h followed by stimulation with CCN3 (30 ng/ml), and in vitro migration was measured with the Transwell after 24 h (D). JJ012 cells were transfected with mutant of IKKĮ and IKKȕ for 24 h followed by stimulation with CCN3 (30 ng/ml), and the mRNA of MMP-13 were determined by using qPCR (E). Results are presented as Mean±S.E. (n=3). * p<0.05 was compared with control. #p<0.05 was compared with CCN3.

Fig 13. NF-țB involved in CCN3-mediated human chondrosarcoma migration and MMP-13 expression.

JJ012 cells were transfected with țB-luciferase expression vector and then pretreated with inhibitor of Ly294002 (10 ȝM) wortmannin (10 ȝM)ǵAkt (10 ȝM)ǵPDTC (10 ȝM)ǵTPCK (10 ȝM) and NF-țB inhibitor peptide (10 ȝM) for 30 min, before incubation with CCN3 (30 ng/ml) for 24 h (A). JJ012 cells were co-transfected with țB-luciferase expression vector and FAK mutantǵp85 mutantǵAkt mutantǵIKKĮ mutantǵIKKȕ mutant for 24 h, before incubation with CCN3 (30 ng/ml) for 24 h (B).

Luciferase activity were determined. Results are presented as mean±S.E.

(n=3). * p<0.05 was compared with control. #p <0.05 was compared with CCN3.

Fig 14. Schematic presentation of the signaling pathways involved in CCN3-induced migration and MMP-13 expression of human chondrosarcoma cells.

CCN3 activates PI3K and Akt pathway, which in turn induces IKKĮ/ȕ phosphorylation, p65 Ser536 phosphorylation, whch leads to MMP-13 expresion and increases the migration through Įvȕ3 and Dvȕ5 integrin.

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