# Autophagy and Senescence in Antiestrogen Resistance

This section breaks one important 2024 review into smaller, easier pages.

The central idea is simple.

**Many ER-positive breast-cancer cells do not die straight away under treatment pressure.**

Some switch into **autophagy**.

Some enter **senescence**.

Both states may help cells stay alive long enough to build durable resistance.

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**Review we are unpacking**

**McGrath MK, Abolhassani A, Guy L, Elshazly AM, Barrett JT, Mivechi NF, Gewirtz DA, and Schoenlein PV (2024).**

**Autophagy and senescence facilitate the development of antiestrogen resistance in ER-positive breast cancer.**

*Frontiers in Endocrinology*. 15:1298423.

URL: <https://doi.org/10.3389/fendo.2024.1298423>
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***

### What this review argues

* Endocrine therapies and CDK4/6 inhibitors often trigger protective survival states.
* Those survival states may buy time for later resistance mutations and rewiring.
* A future strategy may be to add an **autophagy blocker** and later a **senolytic**, at the right point in the sequence.

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This is a review-based framework.

It is not a proven routine treatment pathway.

Hydroxychloroquine, senolytics, and treatment sequencing ideas remain investigational in this setting.
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### Read this section in order

1. [**Overview and key takeaways**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/overview-and-key-takeaways.md)
2. [**Endocrine therapy, CDK4/6, and why resistance still happens**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/endocrine-therapy-cdk4-6-and-why-resistance-still-happens.md)
3. [**Autophagy — the first escape route**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/autophagy-the-first-escape-route.md)
4. [**Senescence — the second escape route**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/senescence-the-second-escape-route.md)
5. [**Established resistance mechanisms**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/established-resistance-mechanisms.md)
6. [**Glossary and trial notes**](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-and-senescence-in-antiestrogen-resistance/glossary-and-trial-notes.md)

***

### Also useful alongside this section

* [Autophagy Escape in ER-Positive Breast Cancer](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/autophagy-escape-in-er-positive-breast-cancer.md)
* [Endocrine Therapy, Stable Disease, and Dormancy in ER-Positive Breast Cancer](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/endocrine-therapy-stable-disease-and-dormancy-in-er-positive-breast-cancer.md)
* [CDK4/6 Options and Supplement Considerations](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/cdk4-6-options-and-supplement-considerations.md)
* [Blood Biopsy Trial — Getting Ahead of Treatment Resistance](/myhealingcommunity-docs/breast-cancer/er-positive-her2-negative/endocrine-therapy-resistance-and-dormancy/blood-biopsy-trial-getting-ahead-of-treatment-resistance.md)

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This information is for education only. It is not medical advice, diagnosis, or treatment. Please speak with a qualified clinician before making changes to care, medication, or supplement use.
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© 2026 Abbey Mitchell. All rights reserved. Please share by URL rather than copying page text.
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