Journals / Turkish Journal of Hematology / 2015 / Cilt: 32 - Sayı: 1

Fare Trombositlerinde Growth Arrest-Specific 6 (Gas6) ve TAM Reseptörleri

Growth Arrest-Specific 6 (Gas6) and TAM Receptors in Mouse Platelets

Pages
58–63
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Results: RT-PCR results indicated the presence of mRNAs encoding Gas6 and Mer in mouse platelets.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Growth arrest-specific 6 (Gas6) is a newly discovered vitamin K-dependent protein, which is a ligand for TAM receptors [Tyro3 (Sky), Axl, and Mer] from the tyrosine kinase family.
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Key Findings & Data:Gas6 knockout mice were resistant to venous and arterial thrombosis.
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Conclusion & Impact:Results: RT-PCR results indicated the presence of mRNAs encoding Gas6 and Mer in mouse platelets.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Growth arrest-specific 6 (Gas6) is a newly discovered vitamin K-dependent protein, which is a ligand for TAM receptors [Tyro3 (Sky), Axl, and Mer] from the tyrosine kinase family. Gas6 knockout mice were resistant to venous and arterial thrombosis. There are contradictory reports on the presence of Gas6 and its receptors in mouse platelets. The objective of this study was to investigate whether Gas6 and its receptors were present in mouse platelets or not. Materials and Methods: Specific pathogen-free BALB/c male and female mice of 8-10 weeks old and 25-30 g in weight were anesthetized under light ether anesthesia and blood samples were taken from their hearts. RNAs were isolated from isolated platelets, and then mRNAs encoding Gas6 and TAM receptors were detected by reverse transcription-polymerase chain reaction (RT-PCR). Protein concentrations of Gas6 and TAM receptors in platelets were measured by ELISA, but not those of Mer, because of the absence of any commercial ELISA kit for mouse specimens. Results: RT-PCR results indicated the presence of mRNAs encoding Gas6 and Mer in mouse platelets. However, although RT- PCR reactions were performed at various temperatures and cycles, we could not detect the presence of mRNAs encoding Axl and Tyro3 (Sky). Receptor protein levels of Axl and Tyro3 were below the detection limits of the ELISA method. Conclusion: We found the presence of mRNAs encoding Gas6 and the receptor Mer in mouse platelets, but not Axl and Tyro3. Gas6, Axl, and Tyro3 protein levels were below the detection limits of the ELISA. The presence of mRNA is not obvious evidence of protein expression in platelets that have no nucleus or DNA. Further studies are required to clarify the presence of Gas6/TAM receptors in platelets using real-time PCR and more sensitive immunological methods, and future studies on mechanisms will indicate whether the Gas6/TAM pathway is a strategy for treatment of disorders.

Özet

Amaç: Gas6 proteini (growth arrest specific 6), K vitaminine bağımlı protein ailesinin yeni bir üyesi olup reseptör tirozin kinazlardan TAM reseptörlerinin [Tyro3 (Sky), Axl ve Mer] bir ligandıdır. Gas6 geni susturulmuş farelerin, venöz tromboembolizme daha dirençli oldukları görülmüştür. Fare trombositlerinde Gas6 proteininin var olup olmadığı konusunda birbiriyle çelişkili yayınlar bulunmaktadır. Biz bu araştırmada, fare trombositlerinde Gas6 proteini ve reseptörlerinin varlığını hem mRNA hem de protein seviyesinde araştırmayı amaçladık. Gereç ve Yöntemler: Spesifik patojen içermeyen 8-10 haftalık, 25-30 gr ağırlığındaki Balb-C ırkı dişi/erkek fareler hafif eter anestezisi altında bayıltıp, kalpten kan örnekleri alındı. Önce trombositlerden mRNAlar elde edildi. Daha sonra ters transkripsiyon-polimeraz zincir reaksiyonu (RT-PCR) yöntemiyle Gas6 ve TAM reseptörlerinin herbirini kodlayan mRNAlar araştırıldı. Trombositlerdeki Gas6 ve TAM reseptör proteinleri ELISA yöntemiyle ölçüldü. Ancak farede Mer protein seviyesini ölçen bir ELISA kiti henüz üretilmediği için Mer seviyesi ölçülemedi. Bulgular: RT-PCR sonuçları fare trombositlerinde Gas6 ve Meri kodlayan mRNAların var olduğunu gösterdi. Çeşitli sıcaklık ve döngülerde RT-PCR deneyleri yapıldığı halde, Axl ve Tyro3e (Sky) ait mRNA varlığı saptanamadı. Gas6, Axl ve Tyro3 (Sky) protein seviyeleri ELISA yöntemlerinin en düşük ölçüm sınırlarının altındaydı. Sonuç: Biz fare trombositlerinde, Gas6 ve onun reseptörlerinden sadece Meri kodlayan mRNAların var olduğunu bulduk ama Axl ve Tyro3ü kodlayan mRNAların varlığını saptayamadık. Protein olarak Gas6, Axl ve Tyro3 seviyeri, ELISA yöntemlerinin ölçüm limitlerinin altındaydı. Trombositlerde mRNAların var olması, protein sentezinin burada yapıldığının kesin bir kanıtı değildir. Çünkü trombositlerde DNA yoktur. Trombositlerde Gas6/TAM reseptörlerinin varlığını daha iyi aydınlatmak için Gerçek Zamanlı-PCR ve yüksek duyarlılığa sahip immunolojik yöntemlerle yapılacak ileri araştırmalara ihtiyaç vardır. Bu moleküllerin fizyolojik mekanizması aydınlatıldığında hastalıkların tedavisinde yeni bir strateji olabilir.

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Cite This Article

URAS, F., KÜÇÜK, B., ÖZAKPINAR, Ö. B., DEMİR, A. M. (2015). Fare Trombositlerinde Growth Arrest-Specific 6 (Gas6) ve TAM Reseptörleri. Turkish Journal of Hematology, Cilt: 32 - Sayı: 1, 58–63. https://ajindex.com/articles/412504

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