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Method Article
Circulating tumor cells (CTCs) have been shown to play an important role in tumor metastasis. Here, a method for the isolation and propagation of CTCs from the whole blood of a syngeneic mouse tumor model of hepatocellular carcinoma (HCC) metastasis is described.
Cancer metastasis is the foremost cause of cancer-associated deaths. Recent studies have shown that circulating tumor cells (CTCs) are important in cancer metastasis. Indeed, the number of CTCs correlates with tumor size. Here, a detailed description is provided of a methodology for isolation and propagation of CTCs from a syngeneic mouse model of hepatocellular carcinoma (HCC) which allows for downstream analysis of potentially important molecular mechanisms of solid organ tumor metastasis. This method is efficient and reproducible. It is a non-invasive technique and, therefore, has potential to replace the invasive biopsy of tissues from humans which may be associated with complications. Therefore, the method discussed here allows for the isolation and propagation of CTCs from whole blood samples such that they can be examined and characterized. This has potential for future adaptation for clinical applications such as diagnosis, and personalized targeted therapy.
The cancer research community has known of the existence of circulating tumor cells (CTCs) since first being observed by Thomas Ashworth in 18691. Since then, CTCs have been shown to be important in tumor metastasis and disease progression2-5. Today, solid tumors are a major cause of morbidity and mortality worldwide. CTCs are rare cells that originate from primary tumors and travel through the blood stream to different organs of which only a small fraction ultimately develop into metastasis2-5. Notably, there is positive correlation between tumor size and CTC number3,4.
An understanding of CTC biology can contribute to the search for targeted therapy. Furthermore, CTCs may have diagnostic applications. To achieve these potential clinical applications, one needs to overcome some current challenges to studying CTCs. One challenge is related to the fact that CTCs may be present as single cells or as clusters and they may even be able to change their phenotype in response to the blood microenvironment2. Moreover, detection can be very challenging, in part, due to the low count of CTCs (a few to hundreds per milliliter) among one billionhematologic cells per milliliterin the blood6. Nevertheless, in recent years, research into the potential clinical applications of CTCs from solid organ cancers has intensified.
Despite these efforts, the challenges of studying and understanding the role of CTCs persist due to the rarity of CTCs and the inadequacy of the technological tools currently available. Despite these challenges, the tremendous potential for clinical applications continues to be an incentive to pursue research into the role of CTCs in cancer metastasis.
We were recently successful in isolating and propagating in cell culture CTCs from an orthotopic syngeneic mouse model of hepatocellular carcinoma (HCC) metastasis5. The purpose of the current paper is to describe in detail all aspects of the successful methodology. The significance of this methodology lies in the fact that this approach may be modified in order to successfully isolate and propagate in culture human CTCs, thus enhancing the possibility of in vitro studies of CTC biology.
There are multiple potential clinical applications for the use of CTCs. CTCs may be useful for prognosis, response monitoring, screening, dynamic monitoring of tumor molecular alterations, and personalized therapy4. Therefore, a better understanding of the biology of CTCs has high potential for clinical impact.
Etik Beyanı: Tüm hayvan çalışmaları New York Şehir Üniversitesi Hunter College Kurumsal Hayvan Bakım ve Kullanım Komitesi (IACUC) tarafından onaylanmıştır.
1. Ön deneme İşlemleri
Tümör Hücre İzolasyonu Sirkülasyon Tüm Kanı 2. Koleksiyonu
NOT: Düzgün cerrahi alan dezenfekte ve dağınıklıktan arınmış olduğundan emin olun. Tüm cerrahi aletler otoklav veya üreticinin tavsiyesine göre bir dezenfektan emmek
Kırmızı kan hücresi (RBC) Liziz Tamponu 3. Tarif
Buffy Coat 4. RBC Liziz
Hücre Kültürü 5. Yayılım
Not: Tümör hücreleri tipik olarak hızlı bir şekilde hücreler kabı içine ekilmiş hücrelerin özgün bir karışımı bol miktarda bulunan, beyaz kan hücreleri büyümektedir. Ortamının tekrar tekrar değiştirme ve kapalı zaman eğrilerinin sonraki geçişleri sonra tüm akyuvar çıkarılır ve kapalı zaman eğrilerinin nispeten saf popülasyon kalır.
Hepatosellüler karsinom 6. Doğrulama Tümör Hücre Hattı Sirkülasyon
Burada tarif edilen yöntem kapalı zaman eğrilerinin izole edilebilir olduğunu göstermiştir. Fareler insanca deneysel sonu noktasında ötenazi edildi. Süreç katılan karbondioksit asfiksi, intra-kardiyak kan kaybı ve servikal dislokasyon. Prosedürün temel aşamalarının bir şeması, Şekil 2 'de gösterilmiştir. Intrakardiyak eksanguinasyon yoluyla toplanan tam kan örnekleri, yukarıda tarif edilen protokol kullanılarak işlenmiştir. Bundan sonra, santrifüjleme RBC...
In this study, how to isolate and propagate CTCs from the whole blood of a syngeneic mouse with HCC were described. The objective of this work is to enhance the ongoing studies of the mechanisms of cancer metastasis.
A factor that contributes to the poor prognosis of many cancers is the lack of timely detection and consequent widespread dissemination of the malignancy3. CTCs originate from primary cancers and spread via the blood stream to distant organs. As such, CTCs are importan...
The authors declare that they have no competing financial interests.
Work in Dr. Ogunwobi’s laboratory is supported by a Research Centers in Minority Institutions Program grant from the National Institute on Minority Health and Health Disparities (MD007599) of the National Institutes of Health. The contents of this manuscript are solely the responsibility of the authors and do not necessarily represent the official views of the NIMHD or the NIH.
Name | Company | Catalog Number | Comments |
Heparin Sodium Salt 1G | VWR | 89508-852 | |
BTX Tube Micro 1.5mL Clear NS | VWR | 89511-254 | 1.5mL pyrogen-free eppendorf Tubes |
Needle Sterile Disp BD 25GX1IN | VWR | BD305125 | 25G Needle |
Slp Tip SRNG 1ml 200 each per pack | VWR | BD309659 | 1mL syringe tip |
Syringe 1ml leur lok Pk 100 | VWR | BD309628 | 1 mL syringe |
VWR Forceps Tissue 6 | VWR | 82027-446 | Forceps |
Cyromold intrm 15X15X5MM PK 100 | VWR | 25608-924 | Cyromold |
Cryo-oct compund 4oz | VWR | 25608-930 | Oct compound |
VWR Slide sprfrst 25X75MM PK72 | VWR | 48311-703 | Slides |
VWR Cover Glass #2 22X5oMM OZ | VWR | 48-382-128 | Cover Glass |
VWR Slide Box True North Fm Pu | VWR | 89140-278 | Slide Box |
Super HT PAP Pen | VWR | 89427-058 | PAP pen |
Water RNASe and DNAse free 2L | VWR | 101454-204 | Nuclease Free Water |
Buffer Tris Ultra Pure Grade 500G | VWR | 97061-796 | Tris Buffer |
Ammonium Chloride ACS Grade 2 5KG | VWR | 97062-048 | Ammonium Chloride Buffer |
Falcon Tissue Culture Dish 60 x 15mm Style polystyrene | VWR | 353002 | Tissue Culture Dish |
Clorox® Germicidal Bleach, Regular | VWR | 89501-620 | Clorox Bleach |
PBS, 1X (Phosphate-Buffered Saline) without calcium & magnesium (500mL) | Thermo Fischer Scientific | 21-040-CV | PBS, 1X |
DMEM, 1X with 4.5 g/L glucose & L-glutamine without sodium pyruvate | Thermo Fischer Scientific | 10-017-CV | DMEM 1X media for BNL 1ME A.7R.1 cells |
Fetal Bovine Seru8m | Thermo Fischer Scientific | 35-010-CV | FBS |
Penicillin Streptomycin Solution, 100X | Thermo Fischer Scientific | 30-002-Cl | Penicillin Streptomycin |
Sorvall Biofuge pico | Thermo Fischer Scientific | 75002411 | 13000rpm Centrifuge |
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