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Articles 1 - 19 of 19
Full-Text Articles in Medicine and Health Sciences
Multifunctional Donepezil Analogues As Cholinesterase And Bace1 Inhibitors, Keith D. Green, Marina Y. Fosso, Sylvie Garneau-Tsodikova
Multifunctional Donepezil Analogues As Cholinesterase And Bace1 Inhibitors, Keith D. Green, Marina Y. Fosso, Sylvie Garneau-Tsodikova
Pharmaceutical Sciences Faculty Publications
A series of 22 donepezil analogues were synthesized through alkylation/benzylation and compared to donepezil and its 6-O-desmethyl adduct. All the compounds were found to be potent inhibitors of both acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), two enzymes responsible for the hydrolysis of the neurotransmitter acetylcholine in Alzheimer’s disease patient brains. Many of them displayed lower inhibitory concentrations of EeAChE (IC50 = 0.016 ± 0.001 µM to 0.23 ± 0.03 µM) and EfBChE (IC50 = 0.11 ± 0.01 µM to 1.3 ± 0.2 µM) than donepezil. One of the better compounds was tested against HsAChE and was …
In Vivo And In Vitro Studies Of Cry5b And Nicotinic Acetylcholine Receptor Agonist Anthelmintics Reveal A Powerful And Unique Combination Therapy Against Intestinal Nematode Parasites, Yan Hu, Melanie Miller, Bo Zhang, Thanh-Thanh Nguyen, Martin K. Nielsen, Raffi V. Aroian
In Vivo And In Vitro Studies Of Cry5b And Nicotinic Acetylcholine Receptor Agonist Anthelmintics Reveal A Powerful And Unique Combination Therapy Against Intestinal Nematode Parasites, Yan Hu, Melanie Miller, Bo Zhang, Thanh-Thanh Nguyen, Martin K. Nielsen, Raffi V. Aroian
Veterinary Science Faculty Publications
Background
The soil-transmitted nematodes (STNs) or helminths (hookworms, whipworms, large roundworms) infect the intestines of ~1.5 billion of the poorest peoples and are leading causes of morbidity worldwide. Only one class of anthelmintic or anti-nematode drugs, the benzimidazoles, is currently used in mass drug administrations, which is a dangerous situation. New anti-nematode drugs are urgently needed. Bacillus thuringiensis crystal protein Cry5B is a powerful, promising new candidate. Drug combinations, when properly made, are ideal for treating infectious diseases. Although there are some clinical trials using drug combinations against STNs, little quantitative and systemic work has been performed to define the …
Early Relapse After Autologous Hematopoietic Cell Transplantation Remains A Poor Prognostic Factor In Multiple Myeloma But Outcomes Have Improved Over Time, Shaji K. Kumar, Angela Dispenzieri, Raphael Fraser, Fei Mingwei, Gorgun Akpek, Robert Cornell, Mohamed Kharfan-Dabaja, Cesar Freytes, Shahrukh Hashmi, Gerhard C. Hildebrandt, Leona Holmberg, Robert Kyle, Hillard Lazarus, Cindy Lee, Jospeh Mikhael, Taiga Nishihori, Jason Tay, Saad Usmani, David Vesole, Ravi Vij, Baldeep Wirk, Amrita Krishnan, Cristina Gasparetto, Tomer Mark, Yago Nieto, Parameswaran Hari, Anita D'Souza
Early Relapse After Autologous Hematopoietic Cell Transplantation Remains A Poor Prognostic Factor In Multiple Myeloma But Outcomes Have Improved Over Time, Shaji K. Kumar, Angela Dispenzieri, Raphael Fraser, Fei Mingwei, Gorgun Akpek, Robert Cornell, Mohamed Kharfan-Dabaja, Cesar Freytes, Shahrukh Hashmi, Gerhard C. Hildebrandt, Leona Holmberg, Robert Kyle, Hillard Lazarus, Cindy Lee, Jospeh Mikhael, Taiga Nishihori, Jason Tay, Saad Usmani, David Vesole, Ravi Vij, Baldeep Wirk, Amrita Krishnan, Cristina Gasparetto, Tomer Mark, Yago Nieto, Parameswaran Hari, Anita D'Souza
Internal Medicine Faculty Publications
Duration of initial disease response remains a strong prognostic factor in multiple myeloma (MM) particularly for upfront autologous hematopoietic cell transplant (AHCT) recipients. We hypothesized that new drug classes and combinations employed prior to AHCT as well as after post-AHCT relapse may have changed the natural history of MM in this population. We analyzed the Center for International Blood and Marrow Transplant Research database to track overall survival (OS) of MM patients receiving single AHCT within 12 months after diagnosis (N=3256) and relapsing early post-AHCT (< 24 months), and to identify factors predicting for early vs late relapses (24−48 months post-AHCT). Over three periods (2001–2004, 2005–2008, 2009–2013), patient characteristics were balanced except for lower proportion of Stage III, higher likelihood of one induction therapy with novel triplets and higher rates of planned post-AHCT maintenance over time. The proportion of patients relapsing early was stable over time at 35–38%. Factors reducing risk of early relapse included lower stage, chemosensitivity, transplant after 2008 and post-AHCT maintenance. Shorter post-relapse OS was associated with early relapse, IgA MM, Karnofsky < 90, stage III, > 1 line of induction and lack of maintenance. Post-AHCT early relapse remains …
A Systematic Review Of Consumer Preference For E-Cigarette Attributes: Flavor, Nicotine Strength, And Type, Samane Zare, Mehdi Nemati, Yuqing Zheng
A Systematic Review Of Consumer Preference For E-Cigarette Attributes: Flavor, Nicotine Strength, And Type, Samane Zare, Mehdi Nemati, Yuqing Zheng
Agricultural Economics Faculty Publications
Objective
Systematic review of research examining consumer preference for the main electronic cigarette (e-cigarette) attributes namely flavor, nicotine strength, and type.
Method
A systematic search of peer-reviewed articles resulted in a pool of 12,933 articles. We included only articles that meet all the selection criteria: (1) peer-reviewed, (2) written in English, and (3) addressed consumer preference for one or more of the e-cigarette attributes including flavor, strength, and type.
Results
66 articles met the inclusion criteria for this review. Consumers preferred flavored e-cigarettes, and such preference varied with age groups and smoking status. We also found that several flavors were …
The Role Of Human Dopamine Transporter In Neuroaids, Jun Zhu, Subramaniam Ananthan, Chang-Guo Zhan
The Role Of Human Dopamine Transporter In Neuroaids, Jun Zhu, Subramaniam Ananthan, Chang-Guo Zhan
Molecular Modeling and Biopharmaceutical Center Faculty Publications
HIV-associated neurocognitive disorder (HAND) remains highly prevalent in HIV infected individuals and represents a special group of neuropathological disorders, which are associated with HIV-1 viral proteins, such as transactivator of transcription (Tat) protein. Cocaine abuse increases the incidence of HAND and exacerbates its severity by enhancing viral replication. Perturbation of dopaminergic transmission has been implicated as a risk factor of HAND. The presynaptic dopamine (DA) transporter (DAT) is essential for DA homeostasis and dopaminergic modulation of the brain function including cognition. Tat and cocaine synergistically elevate synaptic DA levels by acting directly on human DAT (hDAT), ultimately leading to dysregulation …
Reproductive Steroids And Adhd Symptoms Across The Menstrual Cycle, Bethan A. Roberts, Tory Eisenlohr-Moul, Michelle M. Martel
Reproductive Steroids And Adhd Symptoms Across The Menstrual Cycle, Bethan A. Roberts, Tory Eisenlohr-Moul, Michelle M. Martel
Psychology Faculty Publications
Although Attention-Deficit/Hyperactivity Disorder shows (ADHD) male predominance, females are significantly impaired and exhibit additional comorbid disorders during adolescence. However, no empirical work has examined the influence of cyclical fluctuating steroids on ADHD symptoms in women. The present study examined estradiol (E2), progesterone (P4), and testosterone (T) associations with ADHD symptoms across the menstrual cycle in regularly-cycling young women (N=32), examining trait impulsivity as a moderator. Women completed a baseline measure of trait impulsivity, provided saliva samples each morning, and completed an ADHD symptom checklist every evening for 35 days. Results indicated decreased levels of E2 in the context of increased …
Neurotensin Receptor 3/Sortilin Contributes To Tumorigenesis Of Neuroendocrine Tumors Through Augmentation Of Cell Adhesion And Migration, Ji Tae Kim, Dana L. Napier, Heidi L. Weiss, Eun Y. Lee, Courtney M. Townsend, B. Mark Evers
Neurotensin Receptor 3/Sortilin Contributes To Tumorigenesis Of Neuroendocrine Tumors Through Augmentation Of Cell Adhesion And Migration, Ji Tae Kim, Dana L. Napier, Heidi L. Weiss, Eun Y. Lee, Courtney M. Townsend, B. Mark Evers
Markey Cancer Center Faculty Publications
Neurotensin (NTS), a 13–amino acid peptide which is distributed predominantly along gastrointestinal tract, has multiple physiologic and pathologic functions, and its effects are mediated by three distinct NTS receptors (NTSRs). Overexpression and activation of NTS signaling components, especially NTS and/or NTSR1, are closely linked with cancer progression and metastasis in various types of cancers including neuroendocrine tumors (NETs). Although deregulation of NTSR3/sortilin has been implicated in a variety of human diseases, the expression and role of NTSR3/sortilin in NETs have not been elucidated. In this study, we investigated the expression and oncogenic effect of NTSR3/sortilin in NETs. Increased protein levels …
Genotype-Phenotype Study In Patients With Valosin-Containing Protein Mutations Associated With Multisystem Proteinopathy, Ebaa Al-Obeidi, Sejad Al-Tahan, Abhilasha Surampalli, Namita Goyal, Annabel K. Wang, Andreas Hermann, Molly Omizo, Charles D. Smith, Tahseen Mozaffar, Virginia Kimonis
Genotype-Phenotype Study In Patients With Valosin-Containing Protein Mutations Associated With Multisystem Proteinopathy, Ebaa Al-Obeidi, Sejad Al-Tahan, Abhilasha Surampalli, Namita Goyal, Annabel K. Wang, Andreas Hermann, Molly Omizo, Charles D. Smith, Tahseen Mozaffar, Virginia Kimonis
Neurology Faculty Publications
Mutations in valosin‐containing protein (VCP), an ATPase involved in protein degradation and autophagy, cause VCP disease, a progressive autosomal dominant adult onset multisystem proteinopathy. The goal of this study is to examine if phenotypic differences in this disorder could be explained by the specific gene mutations. We therefore studied 231 individuals (118 males and 113 females) from 36 families carrying 15 different VCP mutations. We analyzed the correlation between the different mutations and prevalence, age of onset and severity of myopathy, Paget's disease of bone (PDB), and frontotemporal dementia (FTD), and other comorbidities. Myopathy, PDB and FTD was present in …
Understanding The Patient Experience With Carcinoid Syndrome: Exit Interviews From A Randomized, Placebo-Controlled Study Of Telotristat Ethyl, Lowell B. Anthony, Claire Ervin, Pablo Lapuerta, Matthew H. Kulke, Pamela Kunz, Emily Bergsland, Dieter Hörsch, David C. Metz, Janice Pasieka, Nick Pavlakis, Marianne Pavel, Martyn Caplin, Kjell Öberg, John Ramage, Emily Evans, Qi Melissa Yang, Shanna Jackson, Karie Arnold, Linda Law, Dana B. Dibenedetti
Understanding The Patient Experience With Carcinoid Syndrome: Exit Interviews From A Randomized, Placebo-Controlled Study Of Telotristat Ethyl, Lowell B. Anthony, Claire Ervin, Pablo Lapuerta, Matthew H. Kulke, Pamela Kunz, Emily Bergsland, Dieter Hörsch, David C. Metz, Janice Pasieka, Nick Pavlakis, Marianne Pavel, Martyn Caplin, Kjell Öberg, John Ramage, Emily Evans, Qi Melissa Yang, Shanna Jackson, Karie Arnold, Linda Law, Dana B. Dibenedetti
Markey Cancer Center Faculty Publications
Purpose: Telotristat ethyl, an oral tryptophan hydroxylase inhibitor, is intended to treat carcinoid syndrome by reducing serotonin production. Telotristat ethyl was evaluated in TELESTAR, a Phase III study for patients who had carcinoid syndrome with at least 4 bowel movements (BMs) per day and who were receiving somatostatin analogue therapy. This interview substudy was conducted to provide insight into the patient experience in TELESTAR and to help understand whether reductions in BM frequency (the primary end point) and other symptoms were clinically meaningful.
Methods: Participating sites were asked to invite (before randomization) all eligible patients to telephone interviews scheduled at …
Mutsβ Abundance And Msh3 Atp Hydrolysis Activity Are Important Drivers Of Ctg•Cag Repeat Expansions, Norma Keogh, Kara Y. Chan, Guo-Min Li, Robert S. Lahue
Mutsβ Abundance And Msh3 Atp Hydrolysis Activity Are Important Drivers Of Ctg•Cag Repeat Expansions, Norma Keogh, Kara Y. Chan, Guo-Min Li, Robert S. Lahue
Toxicology and Cancer Biology Faculty Publications
CTG•CAG repeat expansions cause at least twelve inherited neurological diseases. Expansions require the presence, not the absence, of the mismatch repair protein MutSβ (Msh2-Msh3 heterodimer). To evaluate properties of MutSβ that drive expansions, previous studies have tested under-expression, ATPase function or polymorphic variants of Msh2 and Msh3, but in disparate experimental systems. Additionally, some variants destabilize MutSβ, potentially masking the effects of biochemical alterations of the variations. Here, human Msh3 was mutated to selectively inactivate MutSβ. Msh3−/− cells are severely defective for CTG•CAG repeat expansions but show full activity on contractions. Msh3−/− cells provide a single, isogenic system …
Blocking An N-Terminal Acetylation-Dependent Protein Interaction Inhibits An E3 Ligase, Daniel C. Scott, Jared T. Hammill, Jaeki Min, David Y. Rhee, Michele Connelly, Vladislav O. Sviderskiy, Deepak Bhasin, Yizhe Chen, Su-Sien Ong, Sergio C. Chai, Asli N. Goktug, Guochang Huang, Julie K. Monda, Jonathan Low, Ho Shin Kim, Joao A. Paulo, Joe R. Cannon, Anang A. Shelat, Taosheng Chen, Ian R. Kelsall, Arno F. Alpi, Vishwajeeth Pagala, Xusheng Wang, Junmin Peng, Bhuvanesh Singh, J. Wade Harper, Brenda A. Schulman, R. Kiplin Guy
Blocking An N-Terminal Acetylation-Dependent Protein Interaction Inhibits An E3 Ligase, Daniel C. Scott, Jared T. Hammill, Jaeki Min, David Y. Rhee, Michele Connelly, Vladislav O. Sviderskiy, Deepak Bhasin, Yizhe Chen, Su-Sien Ong, Sergio C. Chai, Asli N. Goktug, Guochang Huang, Julie K. Monda, Jonathan Low, Ho Shin Kim, Joao A. Paulo, Joe R. Cannon, Anang A. Shelat, Taosheng Chen, Ian R. Kelsall, Arno F. Alpi, Vishwajeeth Pagala, Xusheng Wang, Junmin Peng, Bhuvanesh Singh, J. Wade Harper, Brenda A. Schulman, R. Kiplin Guy
Pharmaceutical Sciences Faculty Publications
N-terminal acetylation is an abundant modification influencing protein functions. Because ∼80% of mammalian cytosolic proteins are N-terminally acetylated, this modification is potentially an untapped target for chemical control of their functions. Structural studies have revealed that, like lysine acetylation, N-terminal acetylation converts a positively charged amine into a hydrophobic handle that mediates protein interactions; hence, this modification may be a druggable target. We report the development of chemical probes targeting the N-terminal acetylation–dependent interaction between an E2 conjugating enzyme (UBE2M or UBC12) and DCN1 (DCUN1D1), a subunit of a multiprotein E3 ligase for the ubiquitin-like protein NEDD8. The inhibitors are …
Chloroformate Derivatization For Tracing The Fate Of Amino Acids In Cells And Tissues By Multiple Stable Isotope Resolved Metabolomics (Msirm), Ye Yang, Teresa W. -M. Fan, Andrew N. Lane, Richard M. Higashi
Chloroformate Derivatization For Tracing The Fate Of Amino Acids In Cells And Tissues By Multiple Stable Isotope Resolved Metabolomics (Msirm), Ye Yang, Teresa W. -M. Fan, Andrew N. Lane, Richard M. Higashi
Center for Environmental and Systems Biochemistry Faculty Publications
Amino acids have crucial roles in central metabolism, both anabolic and catabolic. To elucidate these roles, steady-state concentrations of amino acids alone are insufficient, as each amino acid participates in multiple pathways and functions in a complex network, which can also be compartmentalized. Stable Isotope-Resolved Metabolomics (SIRM) is an approach that uses atom-resolved tracking of metabolites through biochemical transformations in cells, tissues, or whole organisms. Using different elemental stable isotopes to label multiple metabolite precursors makes it possible to resolve simultaneously the utilization of these precursors in a single experiment. Conversely, a single precursor labeled with two (or more) different …
Quaternary Interactions And Supercoiling Modulate The Cooperative Dna Binding Of Agt, Manana Melikishvili, Michael G. Fried
Quaternary Interactions And Supercoiling Modulate The Cooperative Dna Binding Of Agt, Manana Melikishvili, Michael G. Fried
Center for Structural Biology Faculty Publications
Human O6-alkylguanine-DNA alkyltransferase (AGT) repairs mutagenic O6-alkylguanine and O4-alkylthymine adducts in single-stranded and duplex DNAs. The search for these lesions, through a vast excess of competing, unmodified genomic DNA, is a mechanistic challenge that may limit the repair rate in vivo. Here, we examine influences of DNA secondary structure and twist on protein–protein interactions in cooperative AGT complexes formed on lesion-free DNAs that model the unmodified parts of the genome. We used a new approach to resolve nearest neighbor (nn) and long-range (lr) components from the ensemble-average cooperativity, ωave. We found …
A Phase Iii, Randomized, Multi-Center, Double Blind, Placebo Controlled Study Of Safety And Efficacy Of Lofexidine For Relief Of Symptoms In Individuals Undergoing Inpatient Opioid Withdrawal, Charles W. Gorodetzky, Sharon L. Walsh, Peter R. Martin, Andrew J. Saxon, Kristen L. Gullo, Kousick Biswas
A Phase Iii, Randomized, Multi-Center, Double Blind, Placebo Controlled Study Of Safety And Efficacy Of Lofexidine For Relief Of Symptoms In Individuals Undergoing Inpatient Opioid Withdrawal, Charles W. Gorodetzky, Sharon L. Walsh, Peter R. Martin, Andrew J. Saxon, Kristen L. Gullo, Kousick Biswas
Center on Drug and Alcohol Research Faculty Publications
Background: Lofexidine is an alpha-2-adrenergic receptor agonist approved in the United Kingdom (UK) for the treatment of opioid withdrawal symptoms. Lofexidine has demonstrated better efficacy than placebo for reducing opioid withdrawal symptoms in patients undergoing opioid withdrawal with less reported hypotension than clonidine.
Methods: Designed as an FDA registration trial, this 8-day, randomized, double-blind, placebo-controlled, parallel-group study in 264 patients dependent on short-acting opioids evaluated the efficacy of lofexidine hydrochloride in reducing withdrawal symptoms in patients undergoing opioid withdrawal. The primary efficacy measures were SOWS-Gossop on Day 3 and time-to-dropout. Secondary endpoints included the proportion of participants who were completers; …
A Pilot Investigation Of Acute Inhibitory Control Training In Cocaine Users, Joseph L. Alcorn, Erika Pike, William W. Stoops, Joshua A. Lile, Craig R. Rush
A Pilot Investigation Of Acute Inhibitory Control Training In Cocaine Users, Joseph L. Alcorn, Erika Pike, William W. Stoops, Joshua A. Lile, Craig R. Rush
Behavioral Science Faculty Publications
Background—Disrupted response inhibition and presence of drug-cue attentional bias in cocaine-using individuals have predicted poor treatment outcomes. Inhibitory control training could help improve treatment outcomes by strengthening cognitive control. This pilot study assessed the effects of acute inhibitory control training to drug- and non-drug-related cues on response inhibition performance and cocaine-cue attentional bias in cocaine-using individuals.
Methods—Participants who met criteria for a cocaine-use disorder underwent five sessions of inhibitory control training to either non-drug-related cues (i.e., rectangles) or cocaine cues (n=10/condition) in a single day. Response inhibition and attentional bias were assessed prior to and following training using …
Oral Cannabidiol Does Not Produce A Signal For Abuse Liability In Frequent Marijuana Smokers, Shanna Babalonis, Margaret Haney, Robert J. Malcolm, Michelle R. Lofwall, Victoria R. Votaw, Steven Sparenborg, Sharon L. Walsh
Oral Cannabidiol Does Not Produce A Signal For Abuse Liability In Frequent Marijuana Smokers, Shanna Babalonis, Margaret Haney, Robert J. Malcolm, Michelle R. Lofwall, Victoria R. Votaw, Steven Sparenborg, Sharon L. Walsh
Behavioral Science Faculty Publications
Background—Cannabidiol (CBD) is a naturally occurring constituent of the marijuana plant. In the past few years, there has been great interest in the therapeutic effects of isolated CBD and it is currently being explored for numerous disease conditions (e.g., pain, epilepsy, cancer, various drug dependencies). However, CBD remains a Schedule I drug on the U.S. Controlled Substances Act (CSA). Despite its status, there are no well-controlled data available regarding its abuse liability.
Methods—Healthy, frequent marijuana users (n=31) were enrolled in this within subject, randomized, placebo-controlled, double-blind, multisite study that administered oral cannabidiol (0, 200, 400, 800 …
Structure And Functions Of Angiotensinogen, Hong Lu, Lisa A. Cassis, Craig W. Vander Kooi, Alan Daugherty
Structure And Functions Of Angiotensinogen, Hong Lu, Lisa A. Cassis, Craig W. Vander Kooi, Alan Daugherty
Saha Cardiovascular Research Center Faculty Publications
Angiotensinogen (AGT) is the sole precursor of all angiotensin peptides. Although AGT is generally considered as a passive substrate of the renin–angiotensin system, there is accumulating evidence that the regulation and functions of AGT are intricate. Understanding the diversity of AGT properties has been enhanced by protein structural analysis and animal studies. In addition to whole-body genetic deletion, AGT can be regulated in vivo by cell-specific procedures, adeno-associated viral approaches and antisense oligonucleotides. Indeed, the availability of these multiple manipulations of AGT in vivo has provided new insights into the multifaceted roles of AGT. In this review, the combination of …
Quantitative Mass Spectrometry Reveals Changes In Histone H2b Variants As Cells Undergo Inorganic Arsenic-Mediated Cellular Transformation, Matthew Rea, Tingting Jiang, Rebekah Eleazer, Meredith Eckstein, Alan G. Marshall, Yvonne N. Fondufe-Mittendorf
Quantitative Mass Spectrometry Reveals Changes In Histone H2b Variants As Cells Undergo Inorganic Arsenic-Mediated Cellular Transformation, Matthew Rea, Tingting Jiang, Rebekah Eleazer, Meredith Eckstein, Alan G. Marshall, Yvonne N. Fondufe-Mittendorf
Molecular and Cellular Biochemistry Faculty Publications
Exposure to inorganic arsenic, a ubiquitous environmental toxic metalloid, leads to carcinogenesis. However, the mechanism is unknown. Several studies have shown that inorganic arsenic exposure alters specific gene expression patterns, possibly through alterations in chromatin structure. While most studies on understanding the mechanism of chromatin-mediated gene regulation have focused on histone post-translational modifications, the role of histone variants remains largely unknown. Incorporation of histone variants alters the functional properties of chromatin. To understand the global dynamics of chromatin structure and function in arsenic-mediated carcinogenesis, analysis of the histone variants incorporated into the nucleosome and their covalent modifications is required. Here …
Impact Of Individual Acute Phase Serum Amyloid A Isoforms On Hdl Metabolism In Mice, Myung-Hee Kim, Maria C. De Beer, Joanne M. Wroblewski, Richard J. Charnigo, Ailing Ji, Nancy R. Webb, Frederick C. De Beer, Deneys R. Van Der Westhuyzen
Impact Of Individual Acute Phase Serum Amyloid A Isoforms On Hdl Metabolism In Mice, Myung-Hee Kim, Maria C. De Beer, Joanne M. Wroblewski, Richard J. Charnigo, Ailing Ji, Nancy R. Webb, Frederick C. De Beer, Deneys R. Van Der Westhuyzen
Internal Medicine Faculty Publications
The acute phase (AP) reactant serum amyloid A (SAA), an HDL apolipoprotein, exhibits pro-inflammatory activities, but its physiological function(s) are poorly understood. Functional differences between SAA1.1 and SAA2.1, the two major SAA isoforms, are unclear. Mice deficient in either isoform were used to investigate plasma isoform effects on HDL structure, composition, and apolipoprotein catabolism. Lack of either isoform did not affect the size of HDL, normally enlarged in the AP, and did not significantly change HDL composition. Plasma clearance rates of HDL apolipoproteins were determined using native HDL particles. The fractional clearance rates (FCRs) of apoA-I, apoA-II, and SAA were …