CRS
Cancer Research SocietySeven Lakes HS
01 / 20
Meeting 02 · Monday 09/01

Cancer Biology.

Plus: how to start your own independent research.

Cancer Biology  ·  Independent Research  ·  Jensen Rm 2224
Part I
The cell gone rogue

What cancer actually is.

The core idea

Cancer is evolution, inside you.

Cancer isn't one disease or one mutation. It's a Darwinian process: a single cell picks up a mutation, divides, and its descendants pick up more. Cells that happen to grow faster or die less out-compete their neighbors and take over.

That's why tumors are genetically messy and why they evolve resistance to drugs — you're not fighting one enemy, you're fighting a population that keeps mutating. Every division is another roll of the dice.

1 cell → mutation → clonal expansion → a tumor of competing lineages
each division · a chance to mutate
How it develops

Cancer builds up over years.

One mutation is never enough. Cancer accumulates hits in stages — initiation (first mutation), promotion (those cells expand), progression (more mutations, invasion). The textbook case is the colon:

Normal

Healthy lining

Ordinary colon cells.

APC loss

Small polyp

The first brake fails.

KRAS on

Adenoma

Growth accelerates.

TP53 loss

Carcinoma

Now invasive cancer.

Why risk climbs with age — and why a colonoscopy that removes a polyp prevents a cancer.

The engine of division

The cell cycle & its checkpoints.

G1 → S → G2 → M · checkpoints guard each step

A dividing cell moves through four phases — G1 (grow), S (copy the DNA), G2 (check the copy), M (split). Cyclins and CDKs drive it forward like gears.

At each checkpoint, the cell asks: is the DNA intact? Big enough? Correctly copied? If not, it pauses to repair — or triggers self-destruction. The restriction point in G1 is the point of no return.

Cancer = these checkpoints stop saying "no."

The source

Where the mutations come from.

DNA is copied billions of times, and damage from UV, tobacco, radiation, and copy errors piles up. Mutations come in flavors: point mutations, insertions/deletions, copy-number changes, and translocations — like the Philadelphia chromosome (BCR-ABL) behind CML, shut down by imatinib.

Only a few driver mutations cause cancer; the rest are passengers. Repair systems normally fix errors — when they break (BRCA1/2), damage accumulates. The twist: BRCA-mutant tumors die from PARP inhibitors (“synthetic lethality”).

DNA · copied billions of times
Two kinds of cancer gene

Stuck gas. Cut brakes.

Oncogenes are the accelerator. A proto-oncogene (RAS, MYC, HER2, EGFR) mutates into overdrive — and it only takes one broken copy to floor it. Gain-of-function.

Tumor suppressors are the brakes (TP53, RB, PTEN, BRCA). Here you must lose both copies — Knudson's "two-hit" rule. Loss-of-function. TP53, the "guardian of the genome," is mutated in over half of all cancers.

Insight: you need both — gas and failed brakes — to crash.

Oncogeneaccelerator
Tumor suppressorbrakes

↑ one hit floors the gas · both brakes must fail

The wiring

The pathways cancer hijacks.

Growth signals travel through molecular relay chains. Cancer mutates one node to weld the switch on — and every node is a drug target.

MAPK pathway

RTK → RAS → RAF → MEK → ERK

Relays “divide.” Mutant RAS (~1 in 3 cancers) or BRAF jams it on. Example: BRAF+MEK inhibitors in melanoma.

PI3K pathway

PI3K → AKT → mTOR

Relays “grow & survive.” The brake PTEN is often lost; targeted by PI3K and mTOR inhibitors.

EGFR mutations drive many lung cancers — and EGFR inhibitors target them. (CRS's EGFR L858R project lives right here.)

The unifying framework · Hanahan & Weinberg

The Hallmarks of Cancer.

However a cancer starts, it converges on the same set of acquired capabilities. Master these ten and you understand almost every therapy ever designed.

Hallmark: resisting cell death

Cells are built to self-destruct.

healthy → blebbing → apoptotic bodies

Apoptosis is clean, programmed suicide — the cell packages itself into neat fragments, no mess. Two triggers converge on executioner caspases: the intrinsic path (internal damage → mitochondria, gated by the BCL-2 / BAX balance) and the extrinsic path (external death signals).

Cancer tips that balance toward survival — often by overexpressing BCL-2. Example: venetoclax, a BCL-2 inhibitor, restores apoptosis in leukemia (CLL).

Hallmark: replicative immortality

Why cancer cells never age.

telomeres shorten each division · telomerase rebuilds them

Your chromosomes end in protective caps called telomeres. They shorten a little with every division — a built-in counter. When they run out, a normal cell stops dividing (senescence).

Around 90% of cancers switch the enzyme telomerase back on, rebuilding the caps so the counter never hits zero. That's the difference between a cell that divides ~50 times and one that divides forever.

Hallmark: inducing angiogenesis

A tumor grows its own supply.

No cell can live more than ~1–2 mm from a blood vessel — oxygen won't diffuse further. So a tumor can't grow large… until it flips the "angiogenic switch."

It secretes VEGF, chemically begging nearby vessels to sprout new branches toward it. The new vessels are leaky and chaotic — which is exactly what helps cells escape later. This is why anti-VEGF drugs (bevacizumab) try to starve tumors.

VEGF signal → new vessels sprout toward the tumor
Hallmark: invasion & metastasis

How cancer spreads.

invade → intravasate → circulate → extravasate → colonize

Metastasis — not the primary tumor — causes ~90% of cancer deaths. Cells undergo EMT (they loosen their grip on neighbors), break into a blood vessel, survive the bloodstream, squeeze out elsewhere, and try to colonize a foreign organ. It's staggeringly inefficient — fewer than 0.01% succeed — which is exactly why it's so hard to stop the few that do.

Hallmarks: metabolism & immune evasion

A tumor is an ecosystem.

A tumor isn't just cancer cells — it's a whole microenvironment of blood vessels, immune cells, and support cells the tumor recruits and corrupts.

The Warburg effect

Cancer cells burn glucose by glycolysis even when oxygen is plentiful — inefficient for energy, but fast, and it supplies building blocks for new cells. It's why PET scans (which track glucose uptake) light tumors up.

Immune evasion

T-cells should kill cancer. Tumors hide by displaying PD-L1, a molecular "don't-eat-me" flag. Checkpoint inhibitors (pembrolizumab) rip that flag off — the breakthrough behind modern immunotherapy.

Corrupted neighbors

Tumor-associated fibroblasts and macrophages are tricked into supplying growth signals, remodeling tissue, and even shielding cancer from drugs.

How doctors describe a tumor

Grade vs. stage.

Grade

How abnormal the cells look under the microscope. Low grade = near-normal, slow. High grade = wild, disorganized, fast. It’s about the cells themselves.

Stage · TNM

How far it has spread. T = tumor size/invasion, N = lymph nodes, M = distant metastasis — combined into Stage I–IV.

Why it matters

Stage drives treatment and prognosis more than tumor type. T1N0M0 (Stage I) and T3N2M1 (Stage IV) are worlds apart.

“What kind” matters less than “how far” — catching it early is everything.

Part II
Doing the science yourself

Your first research project.

Reframe

Research = a question nobody has answered.

You don't need to be in a lab coat to do it. Research is asking a specific, unanswered question and producing evidence. Four doors are open to you right now:

Computational / dry-lab

Docking, modeling, ML — real oncology research on your laptop. The most accessible path, and CRS's specialty.

Data / clinical

Public patient datasets (TCGA, SEER) hold thousands of unanswered questions. Just needs a spreadsheet and a hypothesis.

Wet-lab & review

Bench work through a mentor — or a literature review, a legitimate first paper that needs zero equipment.

You need a good question, a method, and a mentor — not a million-dollar lab.

Step 1

Narrow to a real question.

broad interest → one answerable question
01

Start broad, then read

Pick a topic you like. Read reviews on PubMed & Google Scholar until you can explain it.

02

Hunt the gap

Watch for "future work," "remains unknown," "poorly understood." That's your opening.

03

Make it FINER

Feasible, Interesting, Novel, Ethical, Relevant — the test of a good question.

04

Shrink it

"Does drug X bind kinase Y better than the known inhibitor?" beats "cure cancer."

Step 2 · the skill nobody teaches you

Read a paper without drowning.

Never read top to bottom. Read in this order — you'll grasp a paper in 15 minutes instead of two hours:

01

Abstract → Figures

The abstract tells you if it matters; the figures are the results. Understand the figures and you understand the paper.

02

Intro (last paragraph) & Discussion

The last lines of the intro state the actual question. The discussion admits the limitations — often your next project.

03

Methods, only when you'll copy them

Read methods closely just for the technique you plan to reuse. Tools: PubMed, PMC (free full text), Connected Papers, preprints (bioRxiv).

Step 3 · CRS's specialty

The cold email that gets a reply.

it's a numbers game · one yes is all you need

Short. Specific. Proves you read their work. Clear, small ask. Send 30, not 3.

The accessible path

Real research, on a laptop.

Computational oncology needs no wet lab — just a question and free tools. This is exactly how CRS members ran the DCLK1 and EGFR projects.

Molecular docking

Predict how a drug fits a protein pocket. Grab a structure from the Protein Data Bank, dock with AutoDock Vina, visualize in ChimeraX.

Machine learning

Predict activity or classify tumors with Python + scikit-learn. Re-score structures with Boltz-2. Free, and it ends in a manuscript.

Where to learn

Python basics, then follow one published pipeline end-to-end. Our masterclasses walk you through each.

Worked example

A docking study, start to finish.

01

Pick a target

An under-studied cancer protein — say the DCLK1 kinase. Download its 3-D structure from the PDB (7F3G).

02

Build a library

Gather compounds to test — e.g. every FDA-approved drug (thousands, free).

03

Prepare

Clean the protein, define the binding pocket, set up ligands in AutoDock Tools.

04

Dock & score

AutoDock Vina predicts how tightly each compound fits, in kcal/mol. Lower = tighter.

05

Analyze

Rank hits, inspect poses in ChimeraX, compare against known binders.

06

Validate

Re-score with Boltz-2; send top hits to a mentor’s wet lab (MST / ITC).

All on a laptop. This is the CRS DCLK1 project.

Gear up

Your free toolkit.

Everything below is free with a school email — you don’t need to buy anything to start.

Google Colab · free GPU notebooks Python + Jupyter · analysis Zotero · reference manager Connected Papers · related work PubMed / Semantic Scholar ChimeraX / PyMOL · structures AutoDock Vina · docking Overleaf · write the paper GitHub · save your code
Fuel for a dry-lab project

Public data, free to mine.

Thousands of published, downloadable datasets — each one a stack of unanswered questions. A few to start with:

TCGA · tumor genomics cBioPortal · explore mutations GEO · gene expression GDC · NCI data commons SEER · cancer statistics PDB · protein structures Kaggle · ready datasets CRS Dataset Center · curated

Full, curated list lives on slcancerresearch.org.

Reality check

What a first project really looks like.

1–2

Read & pick a topic

Skim reviews until you can explain the area out loud.

3–4

Narrow to a question

Read 20+ papers, find the gap, make it FINER.

5–6

Email mentors & lock a method

Send many; choose the technique you can actually run.

7–12

Do the work

Run the analysis; keep a dated notebook of everything.

13+

Results → write-up

Make figures, then an OncoLegacy article, poster, or submission.

Months, not years. Consistency beats intensity.

Insider advice

How to actually stand out.

Keep a notebook

Date everything. Reproducibility is the line between a hobby and research.

Finish small

A small completed project beats a grand abandoned one. Scope down until it’s doable.

Be reliable

Reply fast, hit deadlines, never run code you can’t explain. Mentors remember this.

Show your work

Publish in OncoLegacy, post updates. Visibility compounds — one project opens the next.

Ask better questions

“Why?” and “What if?” beat “What is?” Curiosity is the whole job.

Don’t ghost

If you commit to a mentor, follow through. The research world is small.

Get it out there

Where to present & compete.

Publish

OncoLegacy (our journal) · student research journals · preprints.

Present

The CRS symposium · poster sessions · local science fairs.

Compete

ISEF · Regeneron STS · JSHS · regional fairs.

And AACR — the professional stage our Orlando team is aiming for. A finished project is your ticket.

Where it leads

From question to published.

01

Question

A specific, answerable gap in the literature.

02

Method & mentor

A tool you can run, and someone to guide it.

03

Result

Data, a figure, a defensible finding.

04

Output

OncoLegacy article, poster, abstract, AACR.

Do it ethically — IRB, honest data, real authorship. (More at our Ethics masterclass.)

Your move

Start this week.

Don't wait until you "know enough" — you learn research by doing it. Pick a topic tonight, and let CRS handle the hard part: finding you a question and a mentor.

Guided ResearchCold-Email 101Computational track

Apply year-round · reviewed in 2–3 days · slcancerresearch.org

Next meeting · 09/21 · Medical Oncology · Literature Study Masterclass
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Next meeting · 09/21 · Medical Oncology · Jensen Rm 2224

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Then go find the answer nobody has yet.

slcancerresearch.org
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