**Executive Summary**
This document summarises research from the Ministry of Science & Technology (JNCASR) that has uncovered a new role for the exocyst complex in autophagy, a cellular cleaning process. This discovery could lead to new therapeutic strategies for diseases like Alzheimer's, Parkinson's, and cancer. The research was published on Dec 18, 2025, in the "Proceedings of the National Academy of Sciences".
**Key Points / Main Content**
* **Autophagy and Disease:**
* Autophagy, the "self-eating" process, removes damaged parts and fights infections in cells.
* Disruptions in autophagy are linked to diseases like Alzheimer's, Huntington's, and cancer (acting as both a suppressor early on and a supporter of later tumor growth).
* Understanding autophagy's regulation is crucial for developing effective therapies.
* **Exocyst Complex's Role:**
* The exocyst complex, normally involved in moving molecules to the cell surface, also plays a key role in autophagy.
* The complex comprises 8 proteins, 7 of which are required for the cell to form autophagosomes ("trash bags").
* If the complex is missing, the cell's autophagosome formation is impaired.
* **Research Findings:**
* The research elucidated the mechanism by which the exocyst complex contributes to the autophagy pathway.
* Findings were published in "Proceedings of the National Academy of Sciences".
**Impact Analysis**
**Researchers (JNCASR)**
* **Impact:** Further research into the exocyst complex and its role in autophagy may be required. They also may need to develop ways of modulating this pathway for disease treatment.
* **Action Required:** Review the publication and continue research efforts in this area.
**Scientists involved in neurodegenerative diseases and cancers**
* **Impact:** The discoveries made by the ministry of science can allow for a new understanding of the molecular underpinnings of these diseases.
* **Action Required:** Use the finding to enhance research and development of potential therapeutics.
Key Entities Referenced
Autophagy: The cellular 'self-eating' process that removes damaged parts and fights infections, relevant in diseases like Alzheimer's, Parkinson's, and cancer.
Department of Science and Technology (DST): The ministry under which the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) functions, and is the source of the reported research.
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR): An autonomous institution, reporting to DST, whose researchers discovered the role of the exocyst complex in autophagy.
Ministry of Science & Technology: The ministry responsible for the press release regarding the research on autophagy.
Ministry of Science & Technology
Newly uncovered missing link in cellular cleanup
can help develop therapeutic strategies for
Alzheimer’s, Parkinson's, and Cancer
प्रव तथ: 18 DEC 2025 4:28PM by PIB Delhi
Researchers have uncovered a surprising player in autophagy or the “self-eating” process that removes
damaged parts, fights infections, and keeps long-lived cells like neurons in good working order.
Identification of key players in the early steps of autophagosome biogenesis, a key stage in the autophagy
pathway, can lay the foundations for modulating the pathway for finding interventions that can restore the
pathway in diseases such as Alzheimer’s, Parkinson's, and cancer.
Just as our homes need regular cleaning, our cells also clear out damaged and unwanted materials through
a process called autophagy.
When a cell fails to clear waste, its health suffers, especially in long-lived neurons. The autophagy
pathway, which removes damaged material and defends against infections, is disrupted in diseases like
Alzheimer’s and Huntington’s. Autophagy also has dual roles in cancer: preventing it early on but
supporting tumor growth later. Autophagy acts as tumor suppressor by maintaining genome integrity and
cellular homeostasis by clearing cellular junk such as protein aggregates and damaged mitochondria. But
it is also a double-edged sword as certain types of cancer cells hijack autophagy for their own survival and
propagation. Understanding its regulation is crucial for the development of effective therapies.
Researchers from Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), an autonomous
institution under the Department of Science and Technology (DST) found that a group of proteins called
the exocyst complex, which normally helps move important molecules to the cell surface, also plays a key
role in autophagy. This complex comprises a team of 8 proteins; interestingly, 7 of the 8 proteins are
required to help the cell grow the trash bag so that it can completely wrap up the waste. When this
complex is missing, the cell’s bag-making factory stops working properly and even starts producing faulty,
non-functional factories.Fig: An autophagosome engulfing its cargo. In this microscopic image, an autophagosome, shown in
green, attempts to wrap around a protein aggregate, shown in magenta. The size is around 1-2 microns.
The researchers led by Prof. Ravi Manjithaya used simple yeast cells to elucidate the formation of
autophagosomes (cellular “trash bags”), thereby providing insights into how this vital process operates in
higher organisms.
They elucidated the mechanism by which a protein complex exocyst, previously recognized for its role in
secretion, also contributes to the autophagy pathway, which is crucial for maintaining cellular health.
Since defects in autophagy are linked to several neurodegenerative diseases and cancers, the findings
published in,” Proceedings of the National Academy of Sciences”, have opened new avenues for
modulating this pathway to restore cellular balance and develop potential therapeutic.
Publication link: https://www.pnas.org/doi/10.1073/pnas.2426476122
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