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น.ส.
ชวนชม มวลประสิทธิ์พร
(Ms.
Chaunchom Maunpasitporn)
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เลขประจำตัวนิสิต
4689663520
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ปีที่เริ่มต้นศึกษา
พ.ศ.
2546
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โปรแกรมการศึกษา
แบบ
2(2)
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ที่อยู่
หน่วยโลหิตวิทยา โรงพยาบาลจุฬาลงกรณ์ ถนนพระราม
4 เขตปทุมวัน กทม. 10330
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เบอร์โทรศัพท์
01-9480420
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E-mail: chaunchom_m@hotmail.com
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ประวัติการศึกษา
อาจารย์ที่ปรึกษาวิทยานิพนธ์
รศ.นพ.
พลภัทร โรจน์นครินทร์
คะแนนสอบภาษาอังกฤษ
(CU-TEP) 470
(CU-SET 62.5%)
Qualify
Examination
Synergistic role of
Epigallocatechin gallate (EGCG) on chronic myeloid leukemiad
ผลการสอบ
ผ่าน
โครงร่างวิทยานิพนธ์
Molecular cloning
and expression of green pit viper (Trimeresurus albolabris)
serine protease
ผลการสอบ
ผ่าน
วิทยานิพนธ์
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Abstract
Green pit viper (GPV) is one of the most common species
responsible for venomous snakebites in Thailand. Its venom
contains numerous proteins, one of which contains the
fibrinogen-clotting effect. Fibrinolysis is then activated,
causing bleeding from low fibrinogen levels. Identification of
these venom components gives us not only deeper insights in the
pathogenesis of snakebites, but also potential novel anti-thrombotic
agents. A molecular biology approach was utilized. The mRNA was
isolated from fresh venom glands of GPV and used to construct a
cDNA phage library of venom protein genes. Each clone was
recovered and sequenced. After conceptual translation, 4 major
families of venom-specific genes were found; 1.) serine
proteases, 2.) snake venom metalloproteases-disintegrin, 3.) C
lectins, and 4.) phospholipase A2. Full-length clones were
obtained using a 5’RACE method. Four novel serine proteases cDNA
from GPV have been cloned and characterized. According to the
sequence homology comparison, two are fibrinogen-clotting
enzymes, which are likely to be the main fibrinogen-clotting
effect found in the crude venom. In addition, there is another
enzyme that is likely to directly digest fibrinogen (fibrinogenolysis).
Furthermore, a new fibrinolytic enzyme (plasminogen activator)
from GPV was cloned. Therefore, the hypofibrinogenemia in humans
is the combination of the fibrinogen-clotting,
fibrinogen-digesting and fibrin clot lysis by the venom.
Detailed analysis showed that the animo acid sequences in the
loops around the active sites were likely responsible for their
differential effects on fibrinogen-fibrin. The recombinant
proteins are now produced and will be tested for their
potentials to be novel anticoagulants and thrombolytic agents.
ผลงาน
Publication
จากวิทยานิพนธ์
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Rojnuckarin P, Muanpasitporn C,
Chanhome L, Arpijuntarangkoon J, Intragumtornchai T. Molecular
cloning of novel serine proteases and phospholipases A2 from
green pit viper (Trimeresurus albolabris) venom gland cDNA
library. Toxicon. 2006 Mar;47(3):279-87. Epub 2005 Dec 20.
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Rojnuckarin P, Intragumtornchai T,
Sattapiboon R, Muanpasitporn C, Pakmanee N, Khow O, Swasdikul D.
The effects of green pit viper (Trimeresurus albolabris and
Trimeresurus macrops) venom on the fibrinolytic system in human.
Toxicon. 1999 May;37(5):743-55.
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