sby update
DESCRIPTION
medical student tutorialTRANSCRIPT
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Anti fibrosis agent in chronic liver
disease( Sho-saiko-To)
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Fibrosis : reaksi inflamatorik
Respons parenkim hati, berupa
wound healing terhadap injury akut / kronik
Akumulasi matriks ekstraselular baru
menggantikan matriks lama Membentuk scar, menyelimuti daerah injury
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Etiologi fibrosis hati
Infeksi kronik VHB
Infeksi kronik VHC
Alkoholisme Obat NASH
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Fibrogenesis hati,
• Dimulai dari aktivasi HSC• Aktivasi : transdifferentiasi 3 tahap
Inisiasi Perpetuasi Resolusi
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Inisiasi• Ditandai dengan perubahan ekspresi gen dan fenotip (transdeferensiasi) HSC• Fenotip baru menjadi lebih sensitif thd :• - Sitokin - stimuli
TGF 1 GF1 PDGF EDF TNF Free radical
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Perpetuasi
Proliferasi HSC
Fibrogenesis
Chemotaksis
Kontraktility
Kemoatraktan
Produksi sitokin
Retinoid menghilang
Degradasi matriks
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Growth factor :- PDGF - Epidermal GF - Fibroblast GF - IGFa- SMAUp regulasi reseptor PDGF
Proliferation
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Contractility
Pemicu :
Thrombin Angiotensi II Vasopresin Prostaglandin ET ( paracrin dan autocrin)
.
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HSC chemotaxis / migrasi
Stimuli : PDGF, ET-1, Chemokine ( MCP-1)
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Deposisi kolagen
• HSC aktif menghasilkan : - MMPs (metalloproteinase) degradasi - TIMPs (Spesific tissue inhibitor) TIMPs >< MMPs alat pengatur fibrotisasi TIMP > MMPs fibrosis >> TIMP < MMPs fibrosis <<
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APOPTOSIS
Dari aktif berubah menjadi quiscens jarang
Bila injury reda, pemacu aktifitas reda, apoptosis
Apoptosis dipacu : - soluble factor - komponen matriks
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Strategies for Antifibrotic Therapies
A. Removal of the Fibrotic stimulus
Alcohol
TherapyAntiviralPhlebotomy (iron >>)Copper ChelationTherapy antihelminthicStop drugs/toxin (c/ methotrexate)
Textbook of Gastroenterology 2003
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B Inhibit activation of HSC
Antioxidan : vitamin E, reservatrol, sylimarin Quercetin,
Sho-saiko-toInterferon-gamma,HGF IL-10PPAR gamma LigandsEndotelin reseptor antagonis : LU135252
Textbook of Gastroenterology 2003
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C. Treatment of the Consequences of HSC ActivationHOE 077Beta-AminopropionitrilePolyenylphosphatidylcholine ( PPC )Soluble TGF beta receptorIndolinonesSho-Saiko-ToCorticosteroidHalofuginoneAlpha PenicillamineMMP-1
Textbook of Gastroenterology 2003
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D. Stimulation apoptosis of HSC Gliotoxin
E. Other Herapeutic Agents Interferon alpha dan ribafirin
Colchicine Prostaglandin E UDCA Fumagillin TNP 470 Farnesyl transferase inhibitor Sho-Saiko-To Glycyrrhizin
Textbook of Gastroenterology 2003
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Mekanisme Kerja Sho-Saiko-To
•Anti Fibrosis Natural Medicine
Review : Gastroenterol Hepatology 2000
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HSC Initiation
• SST- inhibit Lipid peroxidase• Increased hepatic retinoid• Reduced deposition of type1
collagen• Reduced MDA• Number of a-SMA
Hepatology 1999
•Proteksi membran plasma liver •Proteksi HSC from injury•Meningkatkan SOD, Gluth Peroxidase
( Bio& Pharm Bull 1998 )
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HSC-Proliferation
• Hambat aktivasi HSC
• Hambat proliferasi HSC yang diinduksi PDGF
Hepatology 1998
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HSC-Proliferation
SST = antiproliferative and anti fibrogenic effects, in experiment hepatic fibrosis• decreased [3H]thymidine incorp cells• decreased cell number in cell stimulated with fetal calf serum• Suppressed [3H]leucine and [3H]proline incorp.
•Turunkan alpha-SMA•Hambat
migrasi
(Eur J Pharmacol 1999)
Hepatology 1999
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SST suppressed procollagen mRNA expression of Type I and Type III
Deposisi kolagen
Decreased kolagen tipe 1
J. of Hepatology 1998
Hepatology 1999
SST increased MMP-2 activity and prevented TIMP-1 activities on HSCsLife Sciences 2004
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APOPTOSIS
Cancer Res 1994
SST inhibits proliferation of cancer lines by inducing apoptosis and arrest at the G0/G1 phase
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Implikasi Klinik Treatment of Hepatitis B
a randomized trial conducted in Japan in the 1990s, 222 patients chronic active HBV:
106 patients received SST for 12 weeks, followed for a further 12 weeks
106 patients received placebo for 12 weeks, followed by a cross over to SST for another 12 weeks
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Control group
ALT : Decreased significantly with SST in 12 weeks
AST : Decreased significantly with SST in 12 weeks
Control group
SST groupControl group
SST group
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HBe Ag: Tendency decreased of HBeAg antibodies with SST
Anti HBe : Tendency increased of anti HBe antibodies with SST
Control groupSST group SST group
Control group
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In peripheral blood mononuclear cells from 8 patients with
HBV Chronic active ,
SST enhance both IFN-gamma and antibody production,
SST modulate cellular and humoral immune responses specific for HBV-associated antigens.
Immunomodulation of SSTa key role in the therapeutic effect on HBV:
(Int’l J of Immunopharmacology. 1991)
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Treatment of Hepatitis C• In a controlled study, 80 patients HBV chronic
• followed for 7 years.
• Result :
(Prog Med 1994)
SST, N=40 Control, N=40
GOT/GPT normalized 5 1
Anti HCV ( - ) ve 1 0
Dev. With HCC 1 5
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Treatment of Hepatitis C
• In vitro study, 11 patients of HCV-(+) liver cirrhosis & 12 patients of healthy subjects.
• SST increased IL-12 in HCV (+) approximately three fold
• SST increased monocyte/macrophage fraction in HCV ( + ) until almost same as healthy subjects
(Developmental Immunology. 1999)
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Treatment of Hepatitis C
SST adjust the decreased of IL-10 and excessive IL-4 and IL-5 production of mononuclear cells from HCV patients.
(Hepatology. 1997)
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the Memorial Sloan-Kettering Cancer CenterClinical Trial
A Phase II Study, single arm, single center trial,
31 patients will receive 52 weeks therapy with SST 7.5 gram per day.
Outcome : liver biopsies. There is improvement of 2 points or greater on Knodell score
SST for Chronic HCV Patients who are Intolerant to or Have Contraindication to Interferon
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Initial results : New York Nov 18, 2004
10 patients completed the study :
8 patients : ALT/AST reduced
4 out of 7 reduction of viral load
2 out of 10 decrease in Knodell score of 2 points or more
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• A large prospective study was conducted in Japan in the late 1980s and published in Cancer in 1995.
• 260 patients with cirrhosis were randomized to treatment with SST or control.
• HCC was the primary endpoint and was confirmed by angiography, CT and biopsy.
• Patients were followed for 5 years with bimonthly alpha-fetoprotein measurements and quarterly USG.
Cancer 1995
Sho-saiko-to: Prevention of Hepatocellular Carcinoma
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Result
CATEGORY SST Control
Total pasien 130 130
HCC terjadi dalam 6 bulan 3 4
Total pasien yang dianalisa 127 126
Pasien dg HCC 23 33
Hidup dengan HCC 17 24
Meninggal karena HCC 6 9
Meninggal bukan dari HCC 19 28
Pasien yang survived 5 th 102 89
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Control group
SST group
Control group
SST group
SST menurunkan insiden HCC sebesar 33 % ( 23 % SST vs 34 % kontrol )
SST menurunkan angka kematian sebesar 40 % ( 24 % SST vs 40 % kontrol )
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Control group Control group
SST group SST group
Grafik 3 :
Kumulatif incidence HCC pada pasien dengan tingkat AFP awal dibawah 20 ng/ ml dari SST( n=93 ) dibandingkan dengan control ( n=91)
Grafik 4 :
Kumulatif incidence HCC pada pasien dengan tingkat AFP awal antara 20 – 200 ng/ml dari SST ( n=34) dibandingkan dengan control ( n=35)
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Precautions and Side EffectsSST related pneumonitis was reported in 74 patients,
approx. 1 in 20,000, leading to 8 deaths. an underlying lung disease, had been elderly, taking SST longer after the onset of pneumonitis, severe hypoxemia. (Nihon Kyobu Shikkan Gakkai Zasshi 1997).
• In 5 cases, combination SST and interferon causing pneumonitis more likely than each given alone.
(Nihon Kyobu Shikkan Gakkai Zasshi. 1995).
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Conclusion• Berdasar penelitian-penelitian yang telah dilakukan,SST
terbukti memiliki efek anti fibrosis untuk mengatasi gangguan liver dan chemopreventive
• Hasil dari Clinical Trial, membuktikan bahwa SST memberikan manfaat pada penderita Hepatitis B dan C.
• Pemakaian SST (7.5 gram of granule per day) perlu dalam pengawasan dokter dengan adanya kemungkinan efek samping pada fungsi paru
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Thank you!