Life Sciences Commons^™

Novel Post-Translational Modification And Function Of Fus: The Relevance To Amyotrophic Lateral Sclerosis, Alexandra Arenas

Theses and Dissertations--Toxicology and Cancer Biology

Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease characterized by the preferential death of motor neurons. Approximately 10% of ALS cases are familial and 90% are sporadic. Fused in Sarcoma (FUS) is a ubiquitously expressed RNA binding protein implicated in familial ALS and frontotemporal dementia (FTD). FUS is ubiquitously expressed in cells and has a variety of functions in the nucleus and cytoplasm. FUS mutations in the nuclear localization sequence (NLS) causes mislocalization of FUS in the cytoplasm, where it can undergo liquid-liquid phase separation and become stress granules or protein inclusions. Although FUS inclusion bodies can be found in …

Variations On A Theme: Intricacies Of Unanchored Poly-Ubiquitin Signaling And Toxicity, Jessica Renee Blount-Pacheco

Wayne State University Dissertations

Ubiquitin is an 8.5 kDa post-translational modifier involved in essentially all eukaryotic cellular processes. Through a process called ubiquitination, ubiquitinating enzymes chemically attach ubiquitin to substrate proteins to control their fates, resulting in anything from their recruitment into signaling pathways to their proteasomal degradation, with a plethora of possibilities in between. Ubiquitin molecules can also be attached to one another, resulting in poly-ubiquitin chains with various effects depending on the number of ubiquitin molecules and the specific amino acid residues used to link them together. While most poly-ubiquitin in the cell exists as conjugated species, there are also untethered poly-ubiquitin …

Structural Dynamics Of Inosine Triphosphate Pyrophosphatase (Itpa) Protein And Two Clinically Relevant Mutants: Molecular Dynamics Simulations, Yao Houndonougbo, Bethany Pugh, Kandise Vanwormer, Caitlin April, Nicholas Burgis

Chemistry and Biochemistry Faculty Publications

The inosine triphosphate pyrophosphatase (ITPA) protein is responsible for removing noncanonical purine nucleoside triphosphates from intracellular nucleotide pools. Absence of ITPA results in genomic instability and increased levels of inosine in DNA and RNA. The proline to threonine substitution at position 32 (P32T) affects roughly 15% of the global population and can modulate treatment outcomes for cancer, lupus, and hepatitis C patients. The substitution of arginine with cysteine at position 178 (R178C) is extremely uncommon and has only been reported in a small cohort of early infantile encephalopathy patients suggesting that a functional ITPA protein is required for life in …

Ile126his And Lys129his Surface Mutations Aid In Purification Of Haemophilus Influenzae Carbonic Anhydrase Through Increased Metal Ion Affinity, Timothy Rigdon, Kathleen Cornely

Chemistry & Biochemistry Student Scholarship

Carbonic anhydrase (CA) is an enzyme that plays a major role in the survival of many bacterial, chiefly Haemophilus influenzae. Because of its crucial role in bacteria, recent research has turned to CA as a possible target for drug development to kill bacteria and possibly cure different bacterial diseases. While research has focused on this drug target, the isolation and purification of specific types of CA has remained a major obstacle for further research. The current method of immobilized metal affinity chromatography (IMAC) with a Ni-NTA column is used widely for CA purification; however, the H. influenzae carbonic anhydrase …

“C1orf150”: A Novel Regulator Of Jak2 Kinase, And Candidate Tumor Suppressor In Human Blood Cell Progenitors, Tyler M. Wade

Honors Theses and Capstones

Erythropoietin (EPO) is an essential growth factor for red blood cell (RBC) production. In response to anemia, hypoxia-sensing cells in the kidney express and release EPO. EPO then acts in bone marrow to drive RBC formation from erythroid progenitors. Upon binding to its cell surface receptor, EPO triggers a JAK2 kinase signaling cascade for progenitor cell growth. Our lab has discovered a novel regulator of JAK2, “C1ORF150” (“150”). “150” is conserved in H sapiens and primates and is a new orthologue of the B-cell receptor adaptor protein and tumor marker, HGAL. Using a shRNA knockdown approach, I investigated the actions …

Antifungal Defense Molecules From Bacterial Symbionts Of North American Trachymyrmex Ants, Georgia Scherer

CMC Senior Theses

Defensive symbioses, in which microbes provide molecular defenses for an animal host, hold great potential as untapped sources of therapeutically useful antibiotics. Fungus-growing ants use antifungal defenses from bacterial symbionts to suppress pathogenic fungi in their nests. Preliminary chemical investigations of symbiotic bacteria from this large family of ants have uncovered novel antifungal molecules with therapeutic potential, such as dentigerumycin and selvamicin.

In this study, the bacterial symbionts of North American Trachymyrmex fungus-growing ants are investigated for antifungal molecules. Plate-based bioassays using ecologically-relevant fungal pathogens confirmed that these bacteria have antifungal activity. In order to purify and identify the antifungal …

Gravity-Drawing Flexible Silicone Filaments As Fiber Optics And Model Foldamers, Katherine Snell

CMC Senior Theses

Here, we present a method of gravity-drawing polydimethylsiloxane (PDMS) silicone fibers with application as fiber optics and as model foldamers. Beginning as a viscous liquid, PDMS is cured using heat until its measured viscosity reaches 4000 mPa•s. The semi-cured elastomer is then extruded through a tube furnace to produce thin (diameters on the order of hundred micrometers) filaments with scalable lengths. PDMS is biocompatible, gas-permeable, flexible, and hydrophobic. Additionally, the PDMS surface hydrophobicity can be modified via UV exposure, O2 plasma, and corona discharge. We demonstrate the patternibility (i.e patterns of hydrophobicity) of PDMS fibers, adding complexity to potential foldamer …

Protective Effects Of Tiger Milk Mushroom (Lignosus Rhinocerus) Extracts On Oxidative Stress-Induced Neurotoxicity And Aging In Ht22 Cells And C. Elegans, Parinee Kittimongkolsuk

Chulalongkorn University Theses and Dissertations (Chula ETD)

Lignosus rhinocerus (LR) or Tiger Milk Mushroom, a fork medicinal mushroom, has been reported for several pharmacological effects including asthma treatment, anti-inflammatory, anti-proliferative, immuno-modulating effects, promote neurite outgrowth in PC-12 cells, anti-HIV-1 activity, and antioxidants properties. However, the antioxidant properties have only focus on in vitro and no or few studies have reported their protective effects in mouse hippocampal (HT22) cells and Caenorhabditis elegans (C. elegans). This study aims to investigate the neuroprotective effect of three extracts of LR against oxidative stress in both HT22 cells and. C. elegans as well as longevity in C. elegans. In HT22 cells, we …

A Kinesin Adapter Directly Mediates Dendritic Mrna Localization During Neural Development In Mice, Hao Wu, Jing Zhou, Tianhui Zhu, Ivan Cohen, Jason Dictenberg

Publications and Research

Motor protein-based active transport is essential for mRNA localization and local translation in animal cells, yet how mRNA granules interact with motor proteins remains poorly understood. Using an unbiased yeast two–hybrid screen for interactions between murine RNA-binding proteins (RBPs) and motor proteins, here we identified protein interaction with APP tail-1 (PAT1) as a potential direct adapter between zipcode-binding protein 1 (ZBP1, a β-actin RBP) and the kinesin-I motor complex. The amino acid sequence of mouse PAT1 is similar to that of the kinesin light chain (KLC), and we found that PAT1 binds to KLC directly. Studying PAT1 in mouse …

The Effects Of Membrane Physicochemical Properties On Huntingtin Membrane Association And Downstream Aggregation, Maryssa Beasley

Graduate Theses, Dissertations, and Problem Reports

Huntington’s Disease (HD) is a fatal neurodegenerative disorder caused by an expanded glutamine repeat region (polyQ) within the huntingtin protein (htt). As a result of the expanded polyQ domain, htt associates into a variety of toxic aggregate species. The polyQ domain of htt is flanked at the N-terminal end by 17 amino acids (Nt17) that adopt an amphipathic α-helical structure in the presence of binding partners such as lipid membranes. In addition to comprising a lipid binding domain, the Nt17 amphipathic α -helix has been directly implicated in htt aggregation initiation via self-association with other Nt17 α -helices. Due to …

Effect Of Mptp On Α-Synuclein Spreading, Accumulation And Toxicity In Mice With Intrastriatal Innoculation Of Human Α-Synuclein Preformed Fibril, Madiha Mohieldin Merghani

Theses

Parkinson’s disease (PD) is the second most common progressive neurodegenerative disorder, characterized by abnormal accumulation of interneuronal inclusions of α-synuclein (α-syn) known as Lewy bodies (LBs) and Lewy neurites (LNs), and significant loss of dopamine neurons in the substantia nigra pars compacta (SNc) region of the brain. Recent evidence suggests that intrastriatal inoculation of α-syn Preformed Fibril (PFF) into mice induces PD-like LBs and LNs pathology formed by aggregated α-syn in anatomically interconnected brain regions which needs several months of incubation to develop the pathology. In the present study, we have evaluated the effect of different doses of 1-methyl, 4-phenyl, …

Physicochemical Characterization, Structural Determination, And Molecular Dynamic Modeling Of Proso Millet Proteins For Enhanced Food Functionality, Felix Akharume

Theses and Dissertations--Biosystems and Agricultural Engineering

More than one-third of Americans today incorporate plant-based protein into their diet and about 40% believed that plant-based protein is healthier than animal protein, especially Millennials. The increasing global demand for plant-based proteins driven by the high cost of animal proteins, consumers’ desire for lean protein, vegetarianism, and the need for more sustainable green protein products have necessitated research into alternate emerging and underutilized sources of protein to complement or supplement the major plant protein in the market- soy, pea, and gluten. Therefore, this dissertation is focused on the valorization of the proteins in proso millet. Specifically, this work focused …

Evaluation Of Salmonella Enteritidis And Escherichia Coli O157:H7 Volatile Organic Compound Analysis For Food Safety Monitoring: A Preliminary Study, Jessica E. Lemley

Graduate Theses, Dissertations, and Problem Reports

Food borne illness has the potential to impact every point of production from producers to consumers. Food product recalls are common due to the presence of food borne illness causing bacteria. Detection of volatile organic compounds (VOC) have the potential to reduce the number of illnesses and recalls through application of additional monitoring of food products like those most commonly recalled. The objective of this research was to 1) explore the use of closed-loop headspace analysis coupled with gas chromatography-mass spectrometry (GC-MS) on food borne illness causing bacteria and 2) examine the VOC profile of Escherichia coli serotype O157:H7 in …

Characterization Of The Biochemical Properties Of Nudt8, A Novel Coa-Degrading Enzyme That Localizes To The Mitochondria, Evan W. Kerr

Graduate Theses, Dissertations, and Problem Reports

Coenzyme A (CoA) is a vital cofactor that is required for a variety of metabolic reactions including the TCA cycle and the synthesis and oxidation of fatty acids, amino acids and ketone bodies. The importance of CoA is underscored by its tight regulation, as prolonged elevations or inability to synthesize adequate amounts of this cofactor lead to severe metabolic dysfunction. Regulation of CoA biosynthesis has been extensively characterized, however less is known about regulation of CoA and its thioesters via degradation. Presently, two CoA-degrading enzymes, Nudt7 and Nudt19 have been identified as regulators of the peroxisomal pool of (acyl-)CoA in …

Protein/Peptide Characterization Using Mass Spectrometry And Molecular Dynamics Simulations, Ahmad Kiani Karanji

Graduate Theses, Dissertations, and Problem Reports

Mass spectrometry (MS) based-techniques and molecular dynamics (MD) simulations have been used to characterize protein/peptide structure as well as their interactions with lipid vesicles and detergents. Chapter 1 introduces an introduction to the concepts and tools that were used in this work. In Chapter 2, the dominant gas-phase conformer of [M+3H]3+ ions of the model peptide Acetyl-PSSSSKSSSSKSSSSKSSSSK are examined with ion mobility spectrometry (IMS), gas-phase hydrogen deuterium exchange (HDX), and mass spectrometry (MS) techniques. This section furthers the development of a protein structural prediction tool by providing information about gas-phase ion conformers of two model peptides having different solution conformational …

Life In A Rural Emergency Department: Patients Speak To Underlying, Fundamental Disparities In Physician And Resource Allocation, Jessica Gustad

Honors Projects

In the Journal of Health Services Research and Policy, access to health care was defined as, “The availability of an adequate supply of health care services and the individual’s opportunity to obtain health care when it is wanted or needed” (MacKinney, 2014). Current trends in rural emergency departments are trying to communicate a critical message about the fundamental problems with the distribution of health care services in America today and the inability to properly meet the definition above. In rural communities, patient complaints and behaviors demonstrate the pressing concerns of inadequate access to primary care, limited specialty care, insufficient mental …

Identifying Metabolites As Markers Of Fatigue In Athletes, Christopher D. George

Honors Theses

Fatigue in athletes caused by inadequate rest and other stressors can be severely detrimental to their health, and yet there is no reliable way to measure and track fatigue. Many classical measures of fatigue like body mass and resting heart rate are not reliable ways to track the physical fatigue of an athlete because they can change with many factors. In addition, it is not known how academic stress on top of physical stress affects fatigue. Metabolomics is a relatively new area of study and tracking metabolites offers the possibility to produce biomarkers to assess fatigue. This study collected saliva …

Evaluating A Culprit: A Review Of The Biochemical Mechanisms Of Non-Celiac Gluten Intolerance, Callie Cinque

Honors Theses

Non-Celiac Gluten Intolerance (NCGI) has evaded biological and chemical mechanisms since it was first reported in 1978. Celiac Disease, a multi-system immune mediated disorder has long served as the most similar counterpart to NCGI. Less cases of celiac disease are going undiagnosed reflecting an improvement on sensitive and decisive diagnostic tools. However, NCGI has been significantly growing as a diagnosis over the past decade with little match or similarity to the markers found in celiac disease patients. Critical evaluation of NCGI theories, experimentation, and existing hypotheses is necessary. This review seeks to synthesize multiple disciplines of gluten research and enhance …

The Characterization And Reactivity Of Tris(4-Methylpyrazolyl)Methane And Its Tungsten And Molybdenum Metal Complexes, Julia M. Pomeroy

Undergraduate Honors Thesis Collection

The scorpionate ligand tris(pyrazolyl)borate (Tp) has contributed to the understanding of coordination and organometallic chemistry and has proven to be useful in the synthesis of metalloprotein models. Studies focusing on the similar ligand, tris(pyrazolyl)methane (Tpm), have recently been made possible with improved synthetic techniques. Characterization of the Tpm ligand and its metal derivatives, [TpmW(CO)3L]+ and [TpmMo(CO)3L]+, unveiled unexpected activity in the 1H NMR chemical shift of the methane hydrogen after the coordination of a seventh ligand. The more electronegative the seventh ligand was, the more downfield the chemical shift appeared. Various analogs of Tpm have since been synthesized that substitute …

The Exploration Of Nanotoxicological Copper And Interspecific Saccharomyces Hybrids, Matthew Joseph Winans Phd

Graduate Theses, Dissertations, and Problem Reports

Nanotechnology takes advantage of cellular biology’s natural nanoscale operations by interacting with biomolecules differently than soluble or bulk materials, often altering normal cellular processes such as metabolism or growth. To gain a better understanding of how copper nanoparticles hybridized on cellulose fibers called carboxymethyl cellulose (CMC) affected growth of Saccharomyces cerevisiae, the mechanisms of toxicity were explored. Multiple methodologies covering genetics, proteomics, metallomics, and metabolomics were used during this investigation. The work that lead to this dissertation discovered that these cellulosic copper nanoparticles had a unique toxicity compared to copper. Further investigation suggested a possible ionic or molecular mimicry …

Novel Substrate-Free Cholinesterase Based Sensing Of Organophosphorus Compounds, Hailey J. Marini

Legacy Theses & Dissertations (2009 - 2024)

The increasing concerns of chemical weapons used by terrorists is growing, creating a need for infield detection methods that can rapidly detect these compounds that are a major health concern for civilians and military personnel. Displacement is a novel concept for the detection of cholinesterase inhibitors, including organophosphorus compounds, that could replace the classical instrumentation methods currently being used for diagnostics.

Biochemical And Chemical Methods Of Key Derivation For Cryptographic Ciphers, Leif K. Mcgoldrick

Legacy Theses & Dissertations (2009 - 2024)

Cryptography is a vital component of digital communication and digital data in general. The use of cryptography is necessary to support the veracity of data and to protect it from outside parties with malicious intent. Cryptography focuses on two main facets that are vital for this goal: data encryption and user authentication. Encryption protects the data by transforming it into an encrypted text that would not allow someone access without having or breaking the encryption method that was used to make it. User authentication is a multiple part process that allows for one to be able to identify oneself to …

Development Of Dual Functional Dna/Rna Nanostructures For Drug Delivery, Vibhav Amit Valsangkar

Legacy Theses & Dissertations (2009 - 2024)

In addition to the traditional biochemical functions, DNA and RNA have been increasingly studied as building blocks for the formation of various 2D and 3D nanostructures. DNA has emerged as a versatile building block for programmable self-assembly. DNA-based nanostructures have been widely applied in biosensing, bioimaging, drug delivery, molecular computation and macromolecular scaffolding. A variety of strategies have been developed to functionalize these nanostructures. The major advantage is that DNA is a very stable molecule and its base-pairing properties can be easily utilized to control and program the formation of desired nanostructures. In addition, some of these DNA/RNA nanostructures have …

Development Of Small Molecule Antibiotics Against A Conserved Rna Gene Regulatory Element In Gram-Positive Bacteria, Ville Yrjö Petteri Väre

Legacy Theses & Dissertations (2009 - 2024)

Bacterial infections and the rise of antibiotic resistance, especially multidrug resistant strains, have generated a clear need for discovery of novel therapeutics. Most antibiotics in use today are derivatives of previous antibiotics to which resistance mechanisms already exist, and traditionally they have a single target: either a protein or rRNA. Gram-positive bacteria regulate the expression of several essential genes or operons using a mechanism called the T-box. The T-box is a structurally conserved riboswitch-like gene regulator in the 5’-untranslated region (UTR) of numerous essential genes of Gram-positive bacteria. T-boxes are stabilized by cognate, unacylated tRNA ligands, allowing the formation of …

Targeting The Rage Signaling Pathway To Ameliorate The Complications Of Diabetes, Stephen James Dansereau

Legacy Theses & Dissertations (2009 - 2024)

Diabetes is a global health epidemic that can be devastating to those afflicted,

Understanding The Rage Signaling Pathway And Its Contribution To Diabetic Complications, Leon Vegas Ho

Legacy Theses & Dissertations (2009 - 2024)

The binding of advanced glycation end products (AGEs) to the receptor for advanced glycation end products (RAGE) is an important feature of the RAGE signaling pathway that plays a role in the pathogenesis of diabetes. Under high glucose concentration, RAGE expression increases immensely from the formation of a Schiff base by glucose bounded to lysine. This triggers an inflammatory and immune response and upregulates the expression of RAGE and causes an accumulation of AGEs in the body. As a result, this leads to the development of diabetes and other complications such as, atherosclerosis, nephrothapy, and retinopathy. To remedy AGE accumulation, …

Structural And Functional Characterization Of Cazyme And Cazyme-Related Proteins From: Bacteroides Thetaiotaomicron And Porphyromonas Gingivalis: Two Abundant Colonizers Of The Human Microbiome, James Stevenson

Theses and Dissertations (Comprehensive)

The human body consists of approximately 30 trillion cells, while non-human microbes that reside on and within the body outnumber human somatic cells by a factor of 1.3 – 2.3. The interplay between our cells and those of the colonizing microorganisms affect physiology in a multitude of ways, both beneficial and detrimental. Microbes found in the oral cavity, such as the Red Complex member Porphyromonas gingivalis, are associated with pathology, namely periodontal diseases including gum deterioration, tooth decay, and loss of underlying alveolar bone. At the other end of the gastrointestinal tract, microbes such as Bacteroides thetaiotaomicron are found …

Synthesis And Biophysical Analysis Of The Cell-Penetrating Peptide Penetratin And Its Aromatic Analogues, An Le

Theses and Dissertations (Comprehensive)

Cell-penetrating peptides (CPPs) interact with biological membranes, undergo cellular intake/uptake, and may act as potential drug delivery agents. Understanding the molecular interactions of these peptides with membranes contributes to gaining a better knowledge of their potential use in medical and pharmaceutical applications to improve human health. The current research focuses on understanding the mechanisms of a CPP in interaction with different model phospholipid membranes. The peptide penetratin (primary sequence: RQIKIWFQNRRMKWKK) is an example of a CPP that can interact with and pass through biological membranes. The current thesis provides spectroscopic and calorimetric evidence that penetratin associates with lipid membranes. Circular …

Antibiotic Drug Nanocarriers For Probing Of Multidrug Abc Membrane Transporter Of Bacillus Subtilis, Pavan Kumar Cherukuri, Preeyaporn Songkiatisak, Feng Ding, Jeam-Michel Jault, Xiao-Hong Nancy Xu

Chemistry & Biochemistry Faculty Publications

Multidrug membrane transporters can extrude a wide range of substrates, which cause multidrug resistance and ineffective treatment of diseases. In this study, we used three different sized antibiotic drug nanocarriers to study their size-dependent inhibitory effects against Bacillus subtilis. We functionalized 2.4 ± 0.7, 13.0 ± 3.1, and 92.6 ± 4.4 nm silver nanoparticles (Ag NPs) with a monolayer of 11-amino-1-undecanethiol and covalently linked them with antibiotics (ofloxacin, Oflx). The labeling ratios of antibiotics with NPs are 8.6 × 10², 9.4 × 10³, and 6.5 × 10⁵ Oflx molecules per NP, respectively. We designed …

การแบ่งกลุ่มย่อยตามลักษณะทางคลินิกรูปแบบใหม่โดยอาศัยปัญญาประดิษฐ์ ร่วมกับการวิเคราะห์โอมิกส์แบบบูรณาการหลายระดับ เพื่อระบุกลุ่มตัวแทนสารบ่งชี้ทางชีวภาพสำหรับภาวะออทิซึมสเปกตรัม, กัลยภัสสร์ หัสเสม

Chulalongkorn University Theses and Dissertations (Chula ETD)

โรคออทิซึมสเปกตรัมเป็นความผิดปกติเกี่ยวกับพัฒนาการในช่วงเริ่มแรกของระบบประสาทและสมองซึ่งมีอาการทางคลินิกที่หลากหลายมาก ปัจจุบันยังไม่มีสารบ่งชี้เพื่อช่วยในการวินิจฉัยและแบ่งผู้ป่วยเป็นกลุ่มย่อย แต่การวินิจฉัยที่รวดเร็วเป็นสิ่งสำคัญที่จะช่วยให้ผู้ป่วยออทิซึมสเปกตรัมสามารถได้รับการเรียนรู้และพัฒนาพฤติกรรมที่จำเป็นในการดำรงชีวิตได้ การวินิจฉัยโรคออทิซึมสเปกตรัมตามมาตรฐานสากลใช้แบบสอบถามที่มีความซับซ้อนและใช้เวลามาก ซึ่งในปัจจุบันมีการนำเอาเทคโนโลยีปัญญาประดิษฐ์มาประยุกต์ใช้ในการวิเคราะห์ข้อมูลขนาดใหญ่ที่มีความซับซ้อน อย่างไรก็ตามการนำเอาปัญญาประดิษฐ์มาใช้วิเคราะห์อาการทางคลินิกของผู้ป่วยออทิซึมสเปกตรัมยังไม่แพร่หลายนัก ในการศึกษานี้ผู้วิจัยต้องการนำเอาปัญญาประดิษฐ์มาใช้แบ่งผู้ป่วยออทิซึมสเปกตรัมจำนวน 85 ราย ออกเป็นกลุ่มย่อยตามอาการทางคลินิกจากข้อมูลแบบทดสอบในการวินิจฉัยผู้ป่วยออทิซึมสเปกตรัม ADI-R จำนวน 123 ข้อ จากนั้นได้ทำการสร้างโมเดลในการจัดกลุ่มและเปรียบเทียบประสิทธิภาพรวมถึงจำนวนข้อคำถามที่ใช้ในแต่ละโมเดล นอกจากนี้ผู้วิจัยได้ศึกษาหาสารบ่งชี้ทางชีวภาพที่เป็นตัวแทนของโรคออทิซึมสเปกตรัมกลุ่มย่อยจากลักษณะอาการทางคลินิกโดยอาศัยการบูรณาการโอมิกส์หลายระดับ จึงได้ดำเนินการวิเคราะห์รูปแบบทรานสคริปโตม และวิเคราะห์รูปแบบโปรตีโอมของผู้ป่วยออทิซึมสเปกตรัมโดยใช้เซลล์เพาะเลี้ยงชนิดลิมโฟบลาสต์เป็นต้นแบบ โดยใช้เทคนิคการแยกโปรตีนด้วยกระแสไฟฟ้า 2 มิติ (2D-GE) จากนั้นจะทำการระบุโปรตีนด้วยเทคนิค LC-MS/MS เพื่อหาโปรตีนที่ถูกรบกวนการทำงานอย่างมีนัยสำคัญ และบูรณาการข้อมูลเพื่อศึกษาความสอดคล้องและสัมพันธ์กันระหว่างการแสดงออกของโปรตีนและยีน และทำการยืนยันระดับการแสดงออกที่ผิดปกติไปของยีนด้วยเทคนิค Real-time qPCR และโปรตีนด้วยเทคนิค Western blot ในการศึกษาครั้งนี้จากผลการวิเคราะห์ข้อมูลลักษณะอาการทางคลินิกของผู้ป่วยออทิซึมสเปกตรัมจากแบบทดสอบ ADI-R 123 ข้อ พบว่าวิธี K-means clustering ที่แบ่งผู้ป่วยออกเป็น 4 กลุ่มย่อยนั้นให้ประสิทธิภาพในการแบ่งดีที่สุด และเมื่อทำการสร้างโมเดลในการจัดกลุ่มผู้ป่วยตามผลการแบ่งกลุ่มดังกล่าว พบว่าอัลกอริทึม Random forest ที่มีจำนวนต้นไม้ 10 ต้น โดยกระบวนการคัดเลือกข้อมูลแบบ Forward selection ให้ผลการทำนายถูกต้องมากที่สุด (100%) โดยใช้ข้อคำถาม ADI-R เพียง 5 ข้อ ในการแบ่งผู้ป่วยออกเป็นกลุ่มย่อย และจากการวิเคราะห์รูปแบบโปรตีโอมจากเซลล์เพาะเลี้ยงชนิดลิมโฟบลาสต์ของผู้ป่วยออทิซึมสเปกตรัมและออทิซึมสเปกตรัมกลุ่มย่อยด้วยเทคนิค 2D-GE ผู้วิจัยได้ทำการคัดเลือกจุดโปรตีนที่มีการแสดงออกผิดปกติอย่างมีนัยสำคัญและมีค่าสัดส่วนความเข้มแตกต่างกันอย่างน้อยสองเท่ามา 19 จุด เพื่อทำการระบุชนิดของโปรตีนด้วยเทคนิค LC-MS/MS โดยพบว่าจากโปรตีนทั้งหมด HNRNPA2B1 มีระดับการแสดงออกเพิ่มขึ้นในผู้ป่วยออทิซึมสเปกตรัมกลุ่มย่อยที่ไม่มีความผิดปกติด้านภาษารุนแรง โดยที่โปรตีน HNRNPA2B1 MDH2 DLD และ MSN มีระดับการแสดงออกลดลงในผู้ป่วยออทิซึมสเปกตรัมกลุ่มย่อยที่มีความผิดปกติด้านภาษารุนแรง ดังนั้นจากการศึกษาวิจัยในครั้งนี้ได้แสดงให้เห็นว่าการใช้เทคโนโลยีปัญญาประดิษฐ์ในการแบ่งผู้ป่วยออทิซึมสเปกตรัมออกเป็นกลุ่มย่อยตามลักษณะอาการทางคลินิกนั้น สามารถลดความหลากหลายตามลักษณะอาการที่แสดงออกของโรคออทิซึมสเปกตรัมในการวิเคราะห์รูปแบบทรานสคริปโตมและโปรตีโอม รวมถึงการค้นหาโปรตีนที่จำเพาะต่อผู้ป่วยออทิซึมสเปกตรัมกลุ่มย่อย ได้อย่างมีประสิทธิภาพมากขึ้น ซึ่งโปรตีนเหล่านี้อาจใช้เป็นโปรตีนบ่งชี้ในการศึกษาเชิงลึกในประชากรผู้ป่วย เพื่อพัฒนาเป็นสารบ่งชีทางชีวภาพ (Biomarker) หรือศึกษากลไกพยาธิสภาพในระดับชีวโมเลกุลของโรคออทิซึมสเปกตรัมได้ต่อไปในอนาคต