{"id":2757,"date":"2025-10-16T15:13:02","date_gmt":"2025-10-16T18:13:02","guid":{"rendered":"https:\/\/espaconews.com\/?p=2757"},"modified":"2025-10-16T15:14:08","modified_gmt":"2025-10-16T18:14:08","slug":"edicion-genetica-crispr-como-funciona","status":"publish","type":"post","link":"http:\/\/espaconews.com\/en\/edicion-genetica-crispr-como-funciona\/","title":{"rendered":"CRISPR gene editing: how it works"},"content":{"rendered":"

CRISPR gene editing: how it works<\/strong> It is a topic that raises real expectations today, not just scientific fantasies.<\/p>\n\n\n\n

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CANVA<\/figcaption><\/figure>\n<\/figure>\n\n\n\n

In this article you will find a summary<\/strong> clear:<\/p>\n\n\n\n

First, the historical context and molecular basis; second, the operating mechanisms and variants; third, current applications in health and agriculture; fourth, risks and ethical debates; and finally, the situation in Mexico and its projections.<\/p>\n\n\n\n

Rather than presenting isolated theory, you'll understand what's already being done, what's missing, and how it could affect your life or your environment.<\/p>\n\n\n\n

Have you ever wondered how \u201cmolecular scissors\u201d can precisely change a gene?<\/p>\n\n\n\n

Origin and molecular basis<\/h2>\n\n\n\n

In 2012\u20132013, the groups of Jennifer Doudna and Emmanuelle Charpentier described how the CRISPR-Cas9 system could be used to precisely edit genomes, based on a bacterial defense mechanism.<\/p>\n\n\n\n

Since then, that idea has evolved rapidly.<\/p>\n\n\n\n

The system essentially involves two components: a guide RNA (gRNA) that recognizes the region of DNA to be edited, and a Cas protein (such as Cas9) that cuts the double strand of DNA.<\/p>\n\n\n\n

After the cut, cells activate their own repair mechanisms (NHEJ or HDR), which can be used to insert, delete or replace specific sequences.<\/p>\n\n\n\n

A relevant fact: editing costs have dropped dramatically, which has expanded its use in university labs and startups with moderate resources.<\/p>\n\n\n\n

To visualize this better, imagine DNA as a two-lane highway (two strands).<\/p>\n\n\n\n

The gRNA points to a specific spot, the Cas protein acts as a selective removal in that section, and then the internal repair workers<\/strong> They rebuild the asphalt, sometimes with planned variations.<\/p>\n\n\n\n

How does CRISPR gene editing work?<\/h2>\n\n\n\n

Here lies the core of CRISPR gene editing: how it works<\/strong>The process can be divided into several stages:<\/p>\n\n\n\n

Guide RNA (gRNA) design<\/h3>\n\n\n\n

A specific sequence of the target genome (approximately 20 nucleotides) is chosen that precedes a PAM (\u201cProtospacer Adjacent Motif\u201d) site.<\/p>\n\n\n\n

That sequence will guide the system to cut exactly there.<\/p>\n\n\n\n

DNA cutting by the Cas protein<\/h3>\n\n\n\n

The Cas protein (e.g., Cas9) binds the gRNA complex and positions itself on the DNA. If the match is good and the appropriate PAM is found, Cas9 cuts both strands of the DNA.<\/p>\n\n\n\n

DNA repair<\/h3>\n\n\n\n

This is where cellular mechanisms come in:<\/p>\n\n\n\n