astronomy

Regina Santella

Regina Santella is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Regina Santella rather than just read about it. In short: Regina Maria (Padronaggio) Santella (born 1948) is an American environmental scientist who is an emeritus professor at the Columbia University Mailman School of Public Health. She used molecular epidemiology studies and laboratory assays to understand the role of environmental, lifestyle and occupational carcinogens in cancer development as well as to identify susceptible populations.

Key takeaways

Regina Santella belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Regina Santella to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Regina Santella from memory before moving on to harder problems.

Reference excerpt

Regina Maria (Padronaggio) Santella (born 1948) is an American environmental scientist who is an emeritus professor at the Columbia University Mailman School of Public Health. She used molecular epidemiology studies and laboratory assays to understand the role of environmental, lifestyle and occupational carcinogens in cancer development as well as to identify susceptible populations. She is the former Director of Columbia's NIEHS Center for Environmental Health in Northern Manhattan, Chair of the American Association for Cancer Research Molecular Epidemiology Working Group and Vice Dean of Faculty at Mailman.

Early life and education Santella was an undergraduate at Brooklyn College. She moved to the University of Massachusetts Amherst for graduate studies, where she specialized in organic chemistry. Her doctoral research, which she performed at the City University of New York, investigated the interaction of proteins with DNA.

Research and career Santella has studied how environmental chemicals primarily polycyclic aromatic hydrocarbons (PAH), ubiquitous pollutants, and aflatoxin, a dietary toxin produced by a mold, cause cancer. She has enabled precise carcinogen detection through highly specific and sensitive immunoassays. These assays use monoclonal and polyclonal antibodies developed by Santella to measure DNA and protein binding of the carcinogens to produce adducts as well metabolites of the carcinogens in urine. One of the first studies demonstrated that women who smoke had higher levels of PAH-DNA damage in their placental tissue than nonsmokers. Later studies revealed elevated DNA damage in people with environmental, occupational or lifestyle exposures. PAH exposure and breast cancer risk has been investigated in two projects, The Long Island Breast Cancer Study Project (LIBCSP), a population-based case-control study, and the Breast Cancer Family Registry (BCFR). In the LIBCSP, elevated PAH-DNA adducts in blood mononuclear cells was associated with increased breast cancer risk. In the BCFR, a prospective study design used blood samples collected from women who later went on to develop breast cancer as well as controls. Elevated PAH-albumin adducts were associated with increased breast cancer risk. A long term collaboration with Dr. Chien-Jen Chen in Taiwan studied liver cancer using blood and urine specimens collected when participants in a cancer screening program were recruited. Samples from those who developed cancer during followup were assayed as well as samples from unaffected controls. These studies demonstrated that those with higher levels of aflatoxin-albumin adducts, PAH-albumin adducts and oxidative stress at recruitment had elevated risk for liver cancer. This population also was used in one of the first studies to demonstrate that blood biomarkers (plasma DNA methylation) could be used for early diagnosis of liver cancer. Studies on genetic susceptibility to cancer used genotyping and phenotyping methods. Within the BCFR, she has shown that an individuals capacity to repair two types of DNA damage (bulky adducts such as PAH-DNA and double strand breaks impacts breast cancer risk. Other studies have evaluated how environmental and lifestyle factors influence epigenetic modifications (e.g., DNA methylation, telomere length and microRNA expression), and these play a role in cancer risk. In 2023, Research.com named Santella as one of the top 1000 women scientists in the world.

Selected publications Scott M. Lippman; Eric A. Klein; Phyllis J. Goodman; et al. (7 January 2009). "Effect of selenium and vitamin E on risk of prostate cancer and other cancers: the Selenium and Vitamin E Cancer Prevention Trial (SELECT)". JAMA. 301 (1): 39–51. doi:10.1001/jama.2008.864. ISSN 0098-7484. PMC 3682779. PMID 19066370. Wikidata Q29619860. Kyriaki Michailidou; Jonathan Beesley; Sara Lindstrom; et al. (9 March 2015). "Genome-wide association analysis of more than 120,000 individuals identifies 15 new susceptibility loci for breast cancer". Nature Genetics. 47 (4): 373–380. doi:10.1038/ng.3242. ISSN 1061-4036. PMC 4549775. PMID 25751625. Wikidata Q35996692. Jiang W; Kahn SM; Zhou P; et al. (1 December 1993). "Overexpression of cyclin D1 in rat fibroblasts causes abnormalities in growth control, cell cycle progression and gene expression". Oncogene. 8 (12): 3447–3457. ISSN 0950-9232. PMID 8247550. Wikidata Q53476711.

References

Worked examples

Example 1 — a first encounter with Regina Santella

Start with the simplest possible case. Write down what Regina Santella claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Regina Santella before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Regina Santella ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Regina Santella

In research: Regina Santella appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Regina Santella in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Regina Santella is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1948 births, American environmental scientists, Brooklyn College alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Regina Santella outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Regina Santella” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Regina Santella in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Regina Santella means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Regina Santella out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Regina Santella in simple terms?

Why does Regina Santella matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Regina Santella?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Regina Santella.