Researchers at the BRIC-Rajiv Gandhi Centre for Biotechnology (BRIC-RGCB) in Thiruvananthapuram have developed a promising nanopore-based sensing technology that could enable earlier detection and monitoring of biomarkers linked to neurodegenerative diseases. The work focuses particularly on Parkinson’s disease and amyotrophic lateral sclerosis (ALS), conditions in which timely identification of molecular changes remains a major clinical challenge.
The Challenge of Early Detection
Neurodegenerative diseases often progress silently for years before clear clinical symptoms appear. By the time a diagnosis is made, significant neuronal damage may already have occurred. Biomarkers—molecules whose presence, concentration or structural form indicate disease processes—offer a potential window for earlier intervention. Unfortunately, many of these biomarkers exist in biological samples at extremely low concentrations, making them difficult to detect reliably with conventional laboratory methods.
Nanopores, which are extremely small hollow structures, have emerged as powerful tools for single-molecule sensing. When a molecule passes through or interacts with a nanopore, it produces a characteristic electrical signal that can reveal information about the molecule’s size, shape and identity. The RGCB team has advanced this approach by creating a new class of programmable, self-assembling sensors.
Self-Assembling Dual-Diameter Nanopores
The research team, led by Mahendran K.R., with key contributions from PhD student Varsha Shaji and postdoctoral researcher Neethu Puthumadathil, designed short peptides that spontaneously assemble into nanopores of two different diameters. These dual-diameter pores—referred to as smaller “S” pores and larger “L” pores—provide a versatile platform capable of sensing biomolecules with varying shapes and dimensions.
According to the institute, the sensors can distinguish between disease-associated and non-disease-associated forms of target biomarkers even when the molecules are present at very low concentrations within complex protein mixtures. This selectivity and sensitivity represent an important step beyond many existing detection techniques.
The findings have been published in the journal Nature Nanotechnology, underscoring the scientific significance of the work within the fields of nanoscience and biomolecular sensing.
Application to Parkinson’s and ALS Biomarkers
In the case of Parkinson’s disease, the larger pores were used to detect different forms of alpha-synuclein, a protein strongly linked to the condition. The sensors proved sensitive enough to identify the protein at nanomolar concentrations and allowed researchers to observe the aggregation process in real time—watching individual proteins form toxic clumps and eventually longer fibres. The platform also enabled testing of compounds that can interfere with this pathological aggregation.
The smaller pores were employed to detect other relevant molecules, including those associated with ALS, such as forms of the SOD1 protein, as well as humanin, a peptide linked to cellular processes. The ability to tailor pore size to the target molecule expands the potential range of biomarkers that can be studied with the same underlying technology.
Collaborative Foundation
The research was conducted in collaboration with Ulrich Kleinekathöfer’s group at Constructor University in Germany and Krishnananda Chattopadhyay’s group at the CSIR-Indian Institute of Chemical Biology in Kolkata. Such partnerships bring together expertise in peptide design, computational modelling, biophysics and disease biology, strengthening both the fundamental understanding and the translational prospects of the work.
Path Toward Practical Diagnostics
While the current results have been demonstrated in controlled laboratory settings, the researchers note that the technology could eventually be adapted into point-of-care devices. Such devices might detect disease-related biomarkers directly from accessible biological fluids such as blood, offering a less invasive and potentially more scalable route to early screening or disease monitoring.
The same sensing platform may also prove useful beyond neurodegeneration. The institute has indicated that the approach could be extended to biomarkers associated with other conditions, including certain cancers, where early and sensitive detection similarly remains an unmet need.
Significance for Healthcare
Early and accurate detection of neurodegenerative disease processes could open new possibilities for clinical management. It may allow researchers and clinicians to identify individuals at higher risk, monitor disease progression more precisely, and evaluate the effects of experimental therapies at the molecular level before irreversible damage accumulates.
The RGCB work illustrates how advances at the intersection of nanotechnology, peptide chemistry and biotechnology can address long-standing diagnostic gaps. By creating sensors that combine high sensitivity with the ability to discriminate subtle molecular differences, the team has contributed a flexible tool that other laboratories and eventually diagnostic developers may build upon.
Looking Ahead
Further development will be required to move from proof-of-concept demonstrations to robust, clinically validated assays. Questions of reproducibility in complex clinical samples, integration into user-friendly devices, regulatory pathways and cost-effectiveness will all need to be addressed. Nevertheless, the publication of this research in a leading nanoscience journal signals that the fundamental sensing capability has been established at a high level of scientific rigor.
For patients and families affected by Parkinson’s disease, ALS and related disorders, progress in early detection technologies carries particular meaning. While no single advance provides a complete solution, each improvement in the ability to observe disease-related molecular changes brings the field closer to more timely and informed interventions. The self-assembling dual-diameter nanopore sensors developed at BRIC-RGCB represent a meaningful contribution to that ongoing effort.
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