New Biosensor May Help Detect Pre-eclampsia Early in Pregnancy

A smart sensor, a safer pregnancy

Scientists in India have developed a new tool to detect pre-eclampsia early. It’s a fibre-optic biosensor. The sensor uses a special surface coating to find a warning sign in the blood, i.e low levels of placental growth factor (PlGF).

This biosensor could help detect pre-eclampsia before symptoms appear. That means pregnant women may get timely care and avoid serious complications.

The research, published in Biosensors and Bioelectronics, comes from teams at IIT Madras and Vellore Institute of Technology [PMID: 38657380].

Why pre-eclampsia matters

Pre-eclampsia is a dangerous pregnancy condition. It usually starts after 20 weeks. Common signs include high blood pressure, swelling, and protein in the urine. But these signs often show up late, sometimes when it’s already risky.

If left untreated, pre-eclampsia can harm the mother and baby. It can lead to early delivery, organ damage, or even death in severe cases.

How the sensor works

The biosensor is built from polymeric optical fibre, a lightweight material used in advanced communication technology. Researchers coated the fibre with PAMAM dendrimers ( tiny, tree-like molecules). These create more space for antibodies that can bind to PlGF, the important protein linked to pre-eclampsia.

When PlGF levels drop, the sensor picks it up quickly and accurately.

This kind of detection could be done early in pregnancy, before damage begins.

What is PlGF, and why is it important?

PlGF helps the placenta grow healthy blood vessels. In a normal pregnancy, PlGF levels are steady. But in women with pre-eclampsia, those levels fall. Detecting PlGF early gives doctors a chance to monitor at-risk mothers more closely. It also helps plan safe deliveries, especially if the condition worsens.

Currently, PlGF testing is not common in routine checkups. It requires lab tests and trained staff. This new sensor could change that. The sensor is simple, small, and low-cost. That makes it perfect for rural clinics or crowded hospitals. Early tests show the sensor is sensitive and consistent. It works with tiny samples, which means less discomfort for pregnant women.

Health experts are hopeful. A simple test like this could lower pre-eclampsia risks. It could also reduce emergency C-sections and ICU admissions for pregnant women.

Why this matters in India

India still struggles with high maternal mortality rates. Many cases are linked to late diagnosis and poor access to care.

A tool like this could reach underserved areas, where women may not get regular scans or tests. It could offer a quick check, right at the clinic or primary health centre.

Also, it could give doctors a better way to track high-risk pregnancies over time.

Conclusion

This new biosensor isn’t just about tech. It’s about saving lives. With better tools, healthcare workers can act faster. They can detect danger early and can protect mothers and babies before things go wrong.

Source

Chaudhary RK, Madaboosi N, Satija J, Nandagopal B, Srinivasan R, Sai VVR. Polymeric optical fiber biosensor with PAMAM dendrimer-based surface modification and PlGF detection for pre-eclampsia diagnosis. Biosens Bioelectron. 2024 Apr 18;247:116346. doi:10.1016/j.bios.2024.116346.

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