RESEARCH: CANCER
FOLDING PROJECT #15204 PROFILE

This project looks at how PTCH1 moves cholesterol around in cells. PTCH1 is important for stopping cancer-causing signals. When it doesn't work right, cancers like medulloblastoma and basal cell carcinoma can develop. Learning how PTCH1 works could lead to new cancer treatments.

Note: This TLDR is a simplication and may not be 100% accurate.

This project aims to elucidate the cholesterol transport mechanism in PTCH1, a transmembrane protein responsible for inhibiting SMO in the absence of SHH in the hedgehog signaling pathway by reducing access to ciliary membrane cholesterol.

Dysregulation of this pathway (such as the inability of PTCH1 to transport cholesterol and thereby inhibit SMO) has been linked to various cancers, including medulloblastoma and basal cell carcinoma.

Thus, understanding the mechanisms behind PTCH1 cholesterol transport will allow for therapeutic treatments to target these cancers.

---

PTCH1

Patched 1, a transmembrane protein involved in the Hedgehog signaling pathway.

PTCH1 is a protein found on the cell surface that plays a crucial role in regulating the Hedgehog signaling pathway. This pathway is essential for embryonic development and tissue maintenance. PTCH1 acts as a receptor for the Hedgehog ligand, preventing the activation of another protein called SMO when Hedgehog is absent.

---

SMO

Smoothened

SMO is a protein that acts as a key component in the Hedgehog signaling pathway. When Hedgehog binds to its receptor PTCH1, SMO is activated, leading to a cascade of events that ultimately regulate gene expression and cell growth.

---

SHH

Sonic Hedgehog

SHH is a signaling molecule that plays a critical role in embryonic development and tissue maintenance. It binds to its receptor PTCH1, initiating the Hedgehog signaling pathway.

---

Hedgehog signaling pathway

A cell signaling pathway that regulates cell growth, differentiation, and proliferation.

The Hedgehog signaling pathway is a complex series of events that occurs within cells. It is crucial for embryonic development, tissue repair, and the regulation of cell growth. When activated, this pathway can promote cell proliferation and survival.

---

Cholesterol transport

The movement of cholesterol molecules within and between cells.

Cholesterol transport is the process by which cholesterol, a type of fat molecule, is moved around the body. This involves various proteins and cellular mechanisms to ensure that cholesterol reaches its destinations where it is needed for cell membrane structure and function.

---

Cancer

A disease characterized by uncontrolled cell growth and spread.

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. It arises from genetic mutations that disrupt normal cellular controls.

---

Medulloblastoma

A type of brain cancer that originates in the cerebellum.

Medulloblastoma is a malignant tumor that develops in the cerebellum, a part of the brain responsible for coordinating movement and balance. It is most common in children.

---

Basal cell carcinoma

A type of skin cancer that originates in the basal cells.

Basal cell carcinoma is a common type of skin cancer that arises from the basal layer of the epidermis. It typically presents as a pearly or waxy nodule and is usually slow-growing.