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The Rule of Cathepsin Bin the Tumor Environment in Patients with Breast Cancer

دور الكاثبسين B في بيئة الورم عند مريضات سرطان الثدي

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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Aim: to assess the expression ofcathepsin B(ctsB; an important protease) in human breast cancer and correlate that with the tumor grade. Materials and Methods:Serial sections were obtained from 23 formalin-fixed paraffin embedded breast cancer tissue specimens which were collected from Alasad University Hospital and a pathological laboratory in Lattakia - Syria. Tissues were stained for cathepsin B using immunohistochemistry. Tonsil tissues were also included as a positive control. Results:Positive cytoplasmic staining of CtsB was observed in both follicular macrophages and endothelial cells in tonsil sections. In breast cancer tissues, tumor cells, endothelial cells and stroma stained positive for CtsB. The presence of CtsB in blood endothelium significantly correlated with the tumor grade (p=0.049). Conclusion: These results supported the important role of cathepsin B in tumor progression, particularly in angiogenesis. Future studies should investigate the regulating mechanisms of cathepsin activities within the tumor environment, and that can be considered as new tagets for cancer treatment.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تقييم التعبير عن إنزيم الكاثبسين B في أنسجة سرطان الثدي البشرية وربط ذلك بدرجة الورم. تم جمع 23 عينة نسيجية مثبتة بالفورمالدهيد ومغمورة بشمع البارافين من مشفى الأسد الجامعي ومخبر خاص في محافظة اللاذقية. تم استخدام تقنية التلوين المناعي النسيجي لتحري وجود الكاثبسين B في الأنسجة السرطانية، واستخدام نسيج اللوزة كشاهد إيجابي. أظهرت النتائج تعبيرًا إيجابيًا للكاثبسين B في الخلايا الورمية والخلايا البطانية والأوعية الدموية في أنسجة سرطان الثدي. كما أظهرت الدراسة وجود علاقة إحصائية هامة بين تعبير الخلايا البطانية عن الكاثبسين B ودرجة الورم (p=0.049). خلصت الدراسة إلى أن الكاثبسين B يلعب دورًا هامًا في تحفيز تكوين الأوعية الدموية الجديدة في الورم، مما يجعله هدفًا محتملاً لعلاج السرطان. توصي الدراسة بإجراء أبحاث مستقبلية لفهم الآليات التنظيمية لنشاط الكاثبسين B في بيئة الورم وتحديد الجزيئات التي يمكن استخدامها كأهداف علاجية جديدة.
Critical review
دراسة نقدية: تقدم هذه الدراسة إسهامًا مهمًا في فهم دور الكاثبسين B في سرطان الثدي، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، حجم العينة المستخدم في الدراسة صغير نسبيًا (23 عينة فقط)، مما قد يؤثر على تعميم النتائج. ثانيًا، لم تتناول الدراسة بشكل كافٍ العوامل الأخرى التي قد تؤثر على تعبير الكاثبسين B مثل العوامل الوراثية والبيئية. ثالثًا، لم يتم توضيح كيفية اختيار العينات وما إذا كانت تمثل جميع مراحل سرطان الثدي. وأخيرًا، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تضمنت مقارنة مع أنواع أخرى من السرطانات لمعرفة ما إذا كان دور الكاثبسين B مشابهًا أو مختلفًا. على الرغم من هذه النقاط، فإن الدراسة تفتح آفاقًا جديدة للبحث في مجال علاج سرطان الثدي وتحديد أهداف علاجية جديدة.
Questions related to the research
  1. ما هو الهدف الرئيسي من هذه الدراسة؟

    الهدف الرئيسي من الدراسة هو تقييم التعبير عن إنزيم الكاثبسين B في أنسجة سرطان الثدي البشرية وربط ذلك بدرجة الورم.

  2. ما هي التقنية المستخدمة لتحري وجود الكاثبسين B في الأنسجة السرطانية؟

    تم استخدام تقنية التلوين المناعي النسيجي لتحري وجود الكاثبسين B في الأنسجة السرطانية.

  3. ما هي العلاقة الإحصائية الهامة التي توصلت إليها الدراسة؟

    توصلت الدراسة إلى وجود علاقة إحصائية هامة بين تعبير الخلايا البطانية عن الكاثبسين B ودرجة الورم (p=0.049).

  4. ما هي التوصيات التي خلصت إليها الدراسة؟

    توصي الدراسة بإجراء أبحاث مستقبلية لفهم الآليات التنظيمية لنشاط الكاثبسين B في بيئة الورم وتحديد الجزيئات التي يمكن استخدامها كأهداف علاجية جديدة.


References used
BARTHELL E, MYLONAS I, SHABANI N, KUNZE S, KUHN C, JESCHKE U, AND FRIESE K. ImmunohistochemicalVisualisation of Cathepsin-D Expression in Breast Cancer. Anticancer Research 2007; 27: 2035-2040
BRIOZZO P, BADET J, CAPONY F, PIERI I, MONTCOURRIER P, BARRITAULT D, AND ROCHEFORT H. MCF7 mammary cancer cells respond to bFGF and internalize it following its release from extracellular matrix: a permissive role of cathepsin D. Exp Cell Res. 1991; 194(2): 252-259
CASTIGLIONI T, MERINO M, ELSNER B, LAH T, SLOANE B, AND EMMERT-BUCK M. lmmunohistochemical Analysis of Cathepsins D, B, and L in Human Breast Cancer. Human Pathology1994; 25( 9): 857-862
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