Recombinant Saccharomyces cerevisiae Prenylated Rab acceptor 1 (YIP3)

What is YIP3 and what is its role in Saccharomyces cerevisiae?

YIP3 (also known as PRA1) in Saccharomyces cerevisiae encodes the Prenylated Rab Acceptor 1 protein. This integral membrane protein primarily localizes to the Golgi apparatus with secondary localization to the endoplasmic reticulum (ER) . YIP3 functions in membrane trafficking pathways, specifically playing a negative regulatory role in COPII-mediated vesicle transport from the ER to the Golgi . The protein has been found to form distinct complexes with the reticulon protein Rtn1p and the Rab GTPase Ypt1p, suggesting involvement in multiple membrane trafficking pathways .

How is YIP3 structurally characterized and where is it localized within yeast cells?

YIP3 is an integral membrane protein that contains multiple transmembrane domains. Based on homology with mammalian counterparts (YIPF3/YIPF4), it likely has a structure comprising five transmembrane domains with N-terminal and C-terminal regions oriented toward the cytosol and Golgi lumen, respectively .

Regarding cellular localization, microscopy and fractionation studies have revealed that YIP3 exhibits a dual localization pattern:

• Predominantly in the Golgi apparatus

• Secondarily in the endoplasmic reticulum

This localization is consistent with its role in vesicular transport between these organelles. Experimental approaches to determine localization typically include fluorescence microscopy with epitope-tagged YIP3 constructs and subcellular fractionation methods, where the protein can be detected in both P30 (membrane) and S30 (cytosolic) fractions .

What are the recommended methods for purifying recombinant YIP3 protein?

Purification of recombinant YIP3 requires special consideration due to its membrane-integrated nature. Based on published protocols, an effective method involves:

• Cell lysis and membrane fraction isolation:

  • Harvest yeast cells and disrupt using glass beads or mechanical homogenization

  • Perform differential centrifugation to obtain the P30 membrane fraction

  • Resuspend the P30 fraction in lysis buffer containing a suitable detergent (e.g., 1% octylglucoside)

  • Incubate with tumbling for 1 hour at 22°C to solubilize membrane proteins

• Protein extraction and purification:

  • Clear the solubilized material by centrifugation

  • Pre-clear the extract using Sephadex G-25

  • Apply the extract to an appropriate affinity column (using tagged versions of YIP3)

  • Perform washing steps and elute purified protein

For optimal results, researchers should incorporate epitope tags (e.g., myc, HA, or FLAG) to facilitate detection and purification. When expressing recombinant YIP3, it's crucial to consider its association with interacting partners such as Rtn1p or Ypt1p, which may co-purify with the target protein .

What genetic approaches are most effective for studying YIP3 function in yeast?

Several genetic approaches have proven effective for studying YIP3 function:

• Gene deletion/knockout strategies:

  • Standard homologous recombination techniques using selectable markers

  • CRISPR-Cas9 systems adapted for yeast to generate precise deletions

  • Analysis of yip3Δ phenotypes, particularly relating to vesicular transport

• Conditional expression systems:

  • Placing YIP3 under control of inducible promoters (GAL1, MET25, etc.)

  • Repression/depletion approaches using regulated promoters

  • Temperature-sensitive alleles to study essential functions

• Genetic interaction screening:

  • Synthetic genetic array (SGA) analysis to identify genetic interactions

  • Suppressor screens, such as those that identified YIP3 deletion as a suppressor of sec12-4 temperature-sensitive mutations

  • Double mutant analysis with components of vesicular transport machinery

• Fluorescent protein tagging:

  • C-terminal or N-terminal tagging with GFP, mCherry, etc.

  • Live-cell imaging to track YIP3 localization and dynamics

  • Bimolecular fluorescence complementation (BiFC) to study protein-protein interactions

These approaches have successfully revealed YIP3's role in negatively regulating COPII-mediated vesicle transport and its functional relationships with other proteins involved in membrane trafficking .

What proteins are known to interact with YIP3 and how can these interactions be characterized?

YIP3 forms multiple distinct protein complexes within yeast cells. Key interactions include:

• YIP3-Ypt1p complex:

  • YIP3 interacts with the Golgi Rab GTPase Ypt1p

  • This interaction can be detected by co-immunoprecipitation from detergent-solubilized cell extracts

  • The functional significance relates to Rab GTPase cycling and membrane trafficking

• YIP3-Rtn1p complex:

  • YIP3 associates with the reticulon protein Rtn1p

  • Importantly, Ypt1p does not copurify with Rtn1p, indicating YIP3 forms at least two separate complexes

  • This interaction suggests roles in ER morphology and membrane structure

• Interactions with COPII components:

  • YIP3 functionally interacts with the COPII machinery, particularly influencing Sec16 assembly on the ER membrane

  • These interactions can be characterized through genetic and biochemical approaches

Methods to characterize these interactions include:

• Co-immunoprecipitation: Using epitope-tagged versions of YIP3 (e.g., YIP3-myc) to pull down interacting partners

• Yeast two-hybrid assays: To detect direct protein-protein interactions

• Fluorescence microscopy: To assess colocalization of YIP3 with interacting partners

• Bimolecular fluorescence complementation (BiFC): To visualize interactions in living cells

• Proximity labeling approaches: Such as BioID to identify neighboring proteins

Research has shown that YIP3's interactions with these different proteins likely reflect its involvement in multiple aspects of membrane trafficking and organelle structure maintenance .

How does YIP3 interact with the COPII vesicle transport machinery?

YIP3 exhibits a specific regulatory relationship with the COPII vesicle transport machinery, which mediates ER-to-Golgi transport. The interaction is characterized by:

• Negative regulation of COPII vesicle formation:

  • YIP3 deletion rescues sec12-4 mutant phenotypes, indicating it functions as a negative regulator of COPII-mediated vesicle transport

  • This suggests that YIP3 normally restricts or modulates the rate of COPII vesicle formation

• Inhibition of Sec16 assembly:

  • YIP3 specifically hinders Sec16 assembly on the ER membrane

  • Sec16 is a critical scaffold protein for COPII coat assembly

  • This represents a mechanism by which YIP3 may modulate COPII function

• Transcriptional regulation via Ino2/Ino4:

  • YIP3 is a target gene of the transcription factors Ino2/Ino4

  • While Ino2/Ino4 modulate Sar1 activation (the initial step in COPII vesicle formation), YIP3 does not

  • This indicates multiple regulatory layers controlling COPII function

Methodologically, these interactions can be studied through:

• Genetic suppressor screens

• Fluorescence microscopy to visualize Sec16 recruitment to ER exit sites in the presence/absence of YIP3

• In vitro reconstitution assays of COPII vesicle formation

• Quantitative analysis of COPII cargo transport rates

The research suggests that this negative regulation may serve as a "rheostat" to adapt COPII vesicle-mediated transport to changes in the lipid composition of the ER membrane, representing a novel regulatory mechanism for vesicular trafficking .

What post-translational modifications occur on YIP3 and how do they affect its function?

YIP3 undergoes several post-translational modifications (PTMs) that likely regulate its activity, localization, and interactions. The documented modifications include:

Methodological approaches to study these modifications include:

• Mass spectrometry-based proteomics:

  • Phosphoproteomic analysis to identify phosphorylation sites

  • Ubiquitin remnant profiling to detect ubiquitination sites

  • Quantitative analysis to determine stoichiometry of modifications

• Site-directed mutagenesis:

  • Generation of non-modifiable mutants (e.g., S18A to prevent phosphorylation)

  • Creation of phosphomimetic mutants (e.g., S18D or S18E to mimic constitutive phosphorylation)

  • Functional analysis of these mutants to determine the impact on YIP3 activity

• Specific antibodies:

  • Use of phospho-specific antibodies to detect modification status

  • Western blotting to assess modification levels under different conditions

Based on studies of mammalian homologs (YIPF3/YIPF4), phosphorylation may be particularly important for regulating YIP3 function. For instance, in mammalian cells, phosphorylation of serine residues adjacent to the LC3-interacting region (LIR) motif is critical for interaction with autophagy proteins . Similar regulatory mechanisms might exist in yeast YIP3, though this requires further investigation.

How does phosphorylation regulate YIP3 function based on insights from mammalian homologs?

While direct evidence for phosphorylation-dependent regulation of yeast YIP3 is limited, studies on the mammalian homologs YIPF3/YIPF4 provide valuable insights that may be applicable to the yeast protein:

• LIR motif phosphorylation:

  • In mammalian YIPF3, phosphorylation of serine residues (Ser45 and Ser46) adjacent to the LIR motif is critical for interaction with ATG8 proteins

  • Mutation of these residues to alanine (S45A, S46A) abolishes the interaction with LC3 and GABARAPL1

  • This phosphorylation is essential for YIPF3's function in Golgiphagy

• Structural basis for phospho-regulation:

  • Structural modeling using AlphaFold-Multimer indicates that phosphorylated serine residues form hydrogen bonds with specific residues in ATG8 proteins

  • The phosphoserines are located within hydrogen-bonding distances of His9, Arg47, and Lys48 of GABARAPL1

  • This arrangement is similar to that observed in the ER-phagy receptor TEX264

• Experimental approaches to study phospho-regulation:

  • Site-directed mutagenesis to generate non-phosphorylatable (S→A) and phosphomimetic (S→D/E) mutants

  • Immunoprecipitation assays to assess protein-protein interactions

  • Anti-phosphoserine antibodies to detect phosphorylation status

  • Functional assays to determine the impact on biological processes (e.g., Golgiphagy)

While the specific phosphorylation sites and interacting partners may differ between yeast YIP3 and mammalian YIPF3, the principle of phosphorylation-dependent regulation of protein interactions is likely conserved. Researchers studying yeast YIP3 should consider investigating similar phospho-regulatory mechanisms, particularly in the context of protein-protein interactions and membrane trafficking functions.

How is YIP3 expression regulated at the transcriptional level?

YIP3 expression is subject to specific transcriptional regulation mechanisms:

• Regulation by Ino2/Ino4 transcription factors:

  • YIP3 has been identified as a target gene of the Ino2/Ino4 transcription factor complex

  • This suggests that YIP3 expression responds to changes in lipid metabolism or membrane composition

  • The Ino2/Ino4 complex is known to regulate genes involved in phospholipid biosynthesis and membrane function

• Connection to lipid metabolism:

  • The regulation by Ino2/Ino4 links YIP3 expression to cellular lipid status

  • This connection suggests YIP3 may be part of an "ER sensing system" that transcriptionally fine-tunes vesicular transport in response to alterations in lipid composition

• Experimental approaches to study transcriptional regulation:

  • Promoter analysis to identify regulatory elements

  • Chromatin immunoprecipitation (ChIP) to confirm binding of transcription factors

  • Reporter gene assays to quantify promoter activity under different conditions

  • RT-qPCR to measure YIP3 mRNA levels in response to various stimuli or in different genetic backgrounds

The connection between YIP3 expression, lipid metabolism, and vesicular transport suggests a sophisticated regulatory network that coordinates membrane composition with trafficking activity. Researchers can explore this relationship by manipulating lipid metabolism pathways and monitoring the impact on YIP3 expression and function .

What experimental systems are available for inducible expression of recombinant YIP3?

Several experimental systems can be employed for controlled expression of recombinant YIP3 in yeast:

• GAL1 promoter system:

  • The most commonly used inducible system in yeast

  • Expression is repressed by glucose and induced by galactose

  • Allows for tight regulation of YIP3 expression levels

  • Methodology involves cloning YIP3 downstream of the GAL1 promoter in appropriate vectors

• TET-On/TET-Off systems:

  • Based on the tetracycline-responsive regulatory system

  • Allows for dose-dependent regulation of gene expression

  • Can be used for both induction and repression of YIP3

  • Requires expression of the tetracycline transactivator protein

• MET25 promoter system:

  • Regulated by methionine availability in the medium

  • Repressed in the presence of methionine and induced in its absence

  • Provides moderate expression levels with good regulation

• CUP1 promoter system:

  • Induced by copper ions (CuSO₄) in the medium

  • Allows for tunable expression by varying copper concentration

  • Useful for dose-response studies of YIP3 function

For optimal experimental design:

• Include appropriate epitope tags (HA, FLAG, myc) for detection and purification

• Consider the addition of fluorescent protein tags for localization studies

• Include controls to verify expression levels by Western blotting

• Monitor potential effects of overexpression on cellular physiology

When working with membrane proteins like YIP3, it's important to consider that excessive overexpression may lead to mislocalization or aggregation. Therefore, titrating expression levels using inducible systems is particularly valuable for maintaining physiologically relevant conditions while still allowing experimental manipulation.

What phenotypes are associated with YIP3 deletion or overexpression?

YIP3 deletion and overexpression result in distinct phenotypes that provide insights into its cellular functions:

YIP3 Deletion (yip3Δ) Phenotypes:

• Suppression of sec12-4 mutant phenotypes:

  • yip3Δ rescues the growth defects of sec12-4 temperature-sensitive mutants

  • This indicates YIP3 normally functions as a negative regulator of COPII-mediated vesicular transport

• Minimal effects on Rab localization:

  • Surprisingly, intracellular localization of Rab proteins is not significantly perturbed in yip3Δ cells

  • This suggests functional redundancy or compensatory mechanisms in Rab trafficking

• Altered ER-to-Golgi transport dynamics:

  • Enhanced COPII vesicle formation and cargo transport rates

  • This effect is consistent with YIP3's role in hindering Sec16 assembly on the ER membrane

YIP3 Overexpression Phenotypes:

• Inhibition of COPII-mediated transport:

  • Likely results in reduced efficiency of ER-to-Golgi transport

  • May cause accumulation of secretory cargo in the ER

• Potential effects on Golgi morphology:

  • Based on its localization and function, YIP3 overexpression might alter Golgi structure

  • This could impact multiple Golgi-dependent processes

Methodological approaches to study these phenotypes include:

• Growth assays under various conditions (temperature, stress)

• Microscopy to assess organelle morphology

• Biochemical assays to measure transport of specific cargo proteins

• Genetic interaction studies with components of the vesicular transport machinery

These phenotypes highlight YIP3's role in fine-tuning vesicular transport in response to cellular conditions, particularly related to membrane lipid composition .

How does YIP3 function relate to lipid metabolism and membrane composition?

YIP3 function appears to be intimately connected to lipid metabolism and membrane composition through several mechanisms:

• Transcriptional regulation via Ino2/Ino4:

  • YIP3 is a target gene of the Ino2/Ino4 transcription factors, which are major regulators of phospholipid biosynthesis

  • This suggests YIP3 expression responds to changes in cellular lipid status

• Adapting vesicular transport to membrane conditions:

  • YIP3 functions as a negative regulator of COPII-mediated vesicle transport

  • This regulatory mechanism likely serves as a "rheostat" to adapt transport to changes in lipid composition of the ER membrane

• Potential sensing mechanism:

  • The integration of YIP3 in both lipid metabolism pathways and vesicular transport suggests it may be part of an "ER sensing system"

  • This system would transcriptionally fine-tune vesicular transport in response to alterations in membrane lipid composition

Methodological approaches to investigate this relationship include:

• Lipidomic analysis of membrane composition in wild-type versus yip3Δ cells

• Manipulating phospholipid biosynthesis and measuring effects on YIP3 expression and function

• In vitro reconstitution of COPII vesicle formation using membranes of different lipid compositions

• Studying YIP3 function in cells treated with lipid biosynthesis inhibitors

This connection between YIP3, lipid metabolism, and vesicular transport represents an important adaptive mechanism that coordinates membrane biogenesis with trafficking activity, ensuring cellular homeostasis under varying conditions .

What are the functional similarities and differences between yeast YIP3 and mammalian YIPF3/YIPF4?

Yeast YIP3 and its mammalian homologs YIPF3/YIPF4 share several structural and functional features while also exhibiting important differences:

Similarities:

• Structural organization:

  • Both contain multiple transmembrane domains

  • Similar topology with N-terminal regions facing the cytosol

• Golgi localization:

  • Both primarily localize to the Golgi apparatus

  • Secondary localization to the ER

• Involvement in membrane trafficking:

  • Both participate in processes related to vesicular transport

  • Interaction with specific Rab GTPases

Differences:

• Heterodimer formation:

  • Mammalian YIPF3/YIPF4 form a stable heterodimer, with YIPF3 stability dependent on YIPF4

  • Yeast YIP3 forms complexes with Rtn1p and Ypt1p, but does not appear to require a specific partner for stability

• Role in autophagy:

  • Mammalian YIPF3/YIPF4 function as Golgiphagy receptors, directly interacting with autophagy machinery via LC3-interacting regions (LIRs)

  • While yeast YIP3 may have similar functions, direct evidence for its involvement in autophagy-related processes is limited

• Mechanistic details:

  • Mammalian YIPF3 interaction with autophagy machinery depends on phosphorylation of specific serine residues

  • The regulatory mechanisms controlling yeast YIP3 function appear more focused on COPII vesicle formation

Methodological approaches for comparative studies:

• Complementation experiments expressing mammalian YIPF3/YIPF4 in yeast yip3Δ strains

• Domain-swapping experiments to identify functionally conserved regions

• Evolutionary analysis of protein sequences across species

Understanding these similarities and differences provides valuable insights into evolutionarily conserved mechanisms of membrane trafficking regulation and organelle homeostasis.

How can heterologous expression systems be used to study YIP3 function across species?

Heterologous expression systems offer powerful approaches to investigate YIP3 function and conservation across species:

• Expression of yeast YIP3 in mammalian cells:

  • Allows assessment of conserved functions in a different cellular context

  • Can reveal which aspects of YIP3 function are dependent on yeast-specific factors

  • Methodological considerations include codon optimization, appropriate promoters, and mammalian expression vectors

• Expression of mammalian YIPF3/YIPF4 in yeast:

  • Tests functional complementation of yip3Δ phenotypes

  • Can identify evolutionarily conserved functional domains

  • Requires consideration of membrane targeting and topology in the heterologous system

• Chimeric protein approaches:

  • Construction of fusion proteins combining domains from yeast and mammalian homologs

  • Allows mapping of specific functions to distinct protein domains

  • Example: replacing the yeast YIP3 LIR-like motif with the mammalian YIPF3 LIR to test functional conservation

• Cross-species interaction studies:

  • Testing interactions between yeast YIP3 and mammalian binding partners (or vice versa)

  • Can reveal conservation of protein-protein interaction interfaces

  • Methods include co-immunoprecipitation, yeast two-hybrid, and split-GFP approaches

• Methodological considerations:

  • Use of epitope tags that work across species (FLAG, HA, etc.)

  • Adjusting expression levels to avoid artifacts from overexpression

  • Controlling for differences in post-translational modifications between species

  • Consideration of differences in membrane composition and trafficking machinery

These approaches have successfully identified conserved features across the YIP protein family, revealing fundamental mechanisms of membrane trafficking regulation that have been maintained throughout eukaryotic evolution.

How can YIP3 be utilized as a tool for studying vesicular transport and organelle homeostasis?

YIP3's unique properties make it a valuable tool for investigating fundamental aspects of vesicular transport and organelle homeostasis:

• As a modulator of COPII vesicle formation:

  • Controlled expression of YIP3 can be used to tune the rate of ER-to-Golgi transport

  • This allows for investigation of how cells adapt to altered transport kinetics

  • Both overexpression and depletion approaches provide complementary insights

• As a marker for specific membrane domains:

  • YIP3's distinct localization pattern can be exploited to study Golgi and ER membrane organization

  • Fluorescently tagged YIP3 can serve as a marker for tracking organelle dynamics

  • Can be combined with super-resolution microscopy techniques to probe membrane microdomains

• For studying coordination between lipid metabolism and trafficking:

  • YIP3's connection to both lipid regulation and vesicular transport makes it an excellent probe for studying their coordination

  • Changes in YIP3 expression or localization can indicate alterations in the lipid-trafficking relationship

• For investigating evolutionary conservation of trafficking mechanisms:

  • Comparative studies between yeast YIP3 and mammalian homologs can reveal fundamental principles of vesicular transport

  • Domain-swapping experiments can identify functionally conserved regions

Methodological applications include:

• Using YIP3 as part of synthetic biology approaches to control secretory pathway flux

• Employing YIP3 modifications as sensors for membrane composition changes

• Harnessing YIP3's regulatory properties to develop experimental tools for manipulating vesicular transport

These applications highlight YIP3's utility not just as a subject of study but as a tool for investigating broader questions about cellular membrane trafficking systems.

What emerging technologies are enhancing our understanding of YIP3 structure and function?

Several cutting-edge technologies are advancing our understanding of YIP3 biology:

• Cryo-electron microscopy (Cryo-EM):

  • Enables structural determination of membrane proteins in near-native states

  • Could reveal the precise arrangement of YIP3's transmembrane domains

  • Particularly valuable for studying YIP3 in complex with interaction partners like Ypt1p or Rtn1p

• AI-based structural prediction:

  • Tools like AlphaFold-Multimer have already been applied to predict structures of mammalian homologs

  • Can model YIP3 in complex with interaction partners

  • Particularly useful for generating hypotheses about interaction interfaces

• Proximity labeling proteomics:

  • BioID, APEX, or TurboID fused to YIP3 can identify proximal proteins in living cells

  • Provides unbiased identification of the YIP3 interaction network

  • Can be performed under various conditions to detect dynamic changes in interactions

• Live-cell super-resolution microscopy:

  • Techniques such as PALM, STORM, or lattice light-sheet microscopy enable visualization of YIP3 dynamics at nanoscale resolution

  • Can track YIP3 movements between organelles and monitor its association with vesicular carriers

  • Allows correlation with other markers to understand spatial relationships

• In vitro reconstitution systems:

  • Recombinant YIP3 incorporated into artificial membrane systems

  • Allows precise control over membrane composition and interacting proteins

  • Can directly test hypotheses about YIP3's effect on membrane properties

• CRISPR-based genomic engineering:

  • Creation of endogenously tagged YIP3 to study function at physiological expression levels

  • Generation of specific point mutations to test functional hypotheses

  • Development of conditional alleles for temporal control of YIP3 function

By combining these emerging technologies, researchers can develop a comprehensive understanding of YIP3 structure, interactions, and functions in membrane trafficking pathways, potentially revealing new principles of organelle homeostasis and vesicular transport regulation.

What are the most significant unanswered questions about YIP3 function?

Despite considerable progress in understanding YIP3, several important questions remain unanswered:

• Molecular mechanism of Sec16 inhibition:

  • How exactly does YIP3 hinder Sec16 assembly on the ER membrane?

  • Is this effect direct or mediated through other factors?

  • What specific domains of YIP3 are responsible for this activity?

• Relationship to lipid sensing:

  • Does YIP3 directly sense membrane lipid composition?

  • How is information about lipid status transmitted to affect YIP3 function?

  • What specific lipid species are most important for YIP3 regulation?

• Post-translational regulation:

  • How do the various identified PTMs (phosphorylation, ubiquitination, acetylation) affect YIP3 function?

  • Which kinases/phosphatases regulate YIP3 phosphorylation?

  • Is there crosstalk between different modifications?

• Relationship to autophagy:

  • Does yeast YIP3 participate in Golgi autophagy similar to its mammalian homologs?

  • If so, what are the molecular mechanisms involved?

  • How is this function coordinated with its role in vesicular transport?

• Physiological significance:

  • Under what conditions is YIP3 regulation most important for cellular homeostasis?

  • How does YIP3 function change during different growth phases or stress conditions?

  • What are the consequences of dysregulated YIP3 for cellular fitness?

Addressing these questions will require integrative approaches combining structural biology, biochemistry, genetics, and advanced imaging techniques. The answers will not only enhance our understanding of YIP3 biology but also provide insights into fundamental mechanisms of membrane trafficking regulation.

What integrative approaches will advance YIP3 research in the coming years?

Future advances in YIP3 research will likely come from integrative approaches that combine multiple technologies and perspectives:

• Multi-omics integration:

  • Combining proteomics, lipidomics, and transcriptomics to understand YIP3 function in a systems biology context

  • Correlation of YIP3 expression/modification patterns with global cellular changes

  • Network analysis to position YIP3 within larger regulatory frameworks

• Structural biology combined with functional studies:

  • Using structural information from Cryo-EM or AlphaFold predictions to guide functional experiments

  • Structure-based design of specific mutations to test mechanistic hypotheses

  • Integrating structural data with dynamic information from live-cell imaging

• Quantitative cell biology approaches:

  • Development of quantitative assays for YIP3-dependent processes

  • Mathematical modeling of how YIP3 contributes to vesicular transport regulation

  • Single-cell analysis to understand cell-to-cell variability in YIP3 function

• Evolutionary perspectives:

  • Comparative analysis of YIP3 homologs across fungal species

  • Identification of conserved regulatory mechanisms between yeast and mammals

  • Understanding how YIP3 functions have diversified during evolution

• Translational connections:

  • Investigation of how principles learned from yeast YIP3 apply to human disease

  • Exploration of mammalian YIPF3/YIPF4 in pathological contexts

  • Development of potential therapeutic approaches based on fundamental mechanisms