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The female breast is a hemispheric projection of variable size positioned anterior to the pectoralis major and serratus anterior muscles. A fascia layer composed of dense, irregular connective tissue connects it to these muscles.
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The normal, a continuous distribution, is the most important of all the distributions. Its graph is a bell-shaped symmetrical curve, which is observed in almost all disciplines. Some of these include psychology, business, economics, the sciences, nursing, and, of course, mathematics. Some instructors may use the normal distribution to help determine students’ grades. Most IQ scores are normally distributed. Often real-estate prices fit a normal distribution. The normal distribution is...
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Normal Stress01:19

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Related Experiment Video

Updated: Feb 10, 2026

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R-spondin3 Is Associated with Basal-Progenitor Behavior in Normal and Tumor Mammary Cells.

Johanna M Tocci1, Carla M Felcher1, Martín E García Solá1

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Cancer Research
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PubMed
Summary
This summary is machine-generated.

R-spondin3 (RSPO3) is crucial in breast cancer development. Targeting RSPO3 may offer a new treatment strategy for basal-like breast cancers, a particularly aggressive subtype.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Developmental Biology

Background:

  • R-spondin3 (RSPO3) enhances Wnt signaling, impacting various biological processes including cancer.
  • The specific role of RSPO3 in mammary gland development and breast cancer is not well understood.

Purpose of the Study:

  • To investigate the function of RSPO3 in normal mammary gland homeostasis and breast cancer progression.
  • To determine if RSPO3 could be a therapeutic target for basal-like breast cancers.

Main Methods:

  • Examined RSPO3 expression in normal mouse mammary glands and basal-like mammary tumor cells.
  • Performed RSPO3 knockdown and overexpression studies in mouse models.
  • Correlated RSPO3 expression with patient data for breast cancer subtypes.

Main Results:

  • RSPO3 is present in basal stem cells of normal mammary glands but absent in mature luminal cells.
  • RSPO3 knockdown reduced Wnt signaling, EMT-like features, migration, and tumor formation in basal-like cancer cells.
  • RSPO3 overexpression correlated with the basal-like breast cancer subtype in patients.

Conclusions:

  • RSPO3 plays a significant role in mammary gland development and breast cancer progression.
  • RSPO3 is identified as a key modulator and potential therapeutic target for basal-like breast cancers.