1
|
Mocenigo M, Porchetta A, Rossetti M, Brass E, Tonini L, Puzzi L, Tagliabue E, Triulzi T, Marini B, Ricci F, Ippodrino R. Rapid, Cost-Effective Peptide/Nucleic Acid-Based Platform for Therapeutic Antibody Monitoring in Clinical Samples. ACS Sens 2020; 5:3109-3115. [PMID: 32909731 DOI: 10.1021/acssensors.0c01046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We demonstrate here a homogeneous assay, named NanoHybrid, for monoclonal antibody quantification directly in serum samples in a single-step format. NanoHybrid is composed of both synthetic peptide nucleic acids (PNAs) and nucleic acid strands conjugated to recognition elements and optical labels and is designed to allow fast fluorescence quantification of a therapeutic antibody. More specifically, we have characterized our analytical assay for the detection of trastuzumab (Herceptin), a monoclonal antibody (mAb) drug used for breast cancer treatment and for tumors overexpressing the HER2/neu protein. We show here that NanoHybrid is capable of performing fast drug quantification directly in blood serum. The results obtained with a pool of samples from breast cancer patients under trastuzumab treatment are compared with CE-IVD ELISA (enzyme-linked immunosorbent assay) showing a good agreement (Cohen's K = 0.729). Due to the modular nature of the NanoHybrid platform, this technology can be programmed to potentially detect and quantify any antibody for which a high-affinity recognition element has been characterized. We envision the application of NanoHybrid in a point-of-care (POC) drug monitoring system based on disposable kits for therapeutic drug management.
Collapse
Affiliation(s)
- Marco Mocenigo
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
- Molecular Genetics and Biotechnology PhD Study Programme, University of Nova Gorica, Vipavska 13, 5000 Nova Gorica, Slovenia
| | - Alessandro Porchetta
- Department of Chemistry, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Marianna Rossetti
- Department of Chemistry, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Erik Brass
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
| | - Lucia Tonini
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
| | - Luca Puzzi
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
| | - Elda Tagliabue
- Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy
| | - Tiziana Triulzi
- Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, 20133 Milan, Italy
| | - Bruna Marini
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
| | - Francesco Ricci
- Department of Chemistry, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Rudy Ippodrino
- Ulisse BioMed Labs, Area Science Park, SS 14, km 163.5, 34149 Trieste, Italy
| |
Collapse
|
2
|
Brass E, Hanson E, O'Tierney-Ginn PF. Placental oleic acid uptake is lower in male offspring of obese women. Placenta 2013; 34:503-9. [PMID: 23602336 DOI: 10.1016/j.placenta.2013.03.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 02/26/2013] [Accepted: 03/23/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION The fetus is dependent on the placenta for its supply of long chain polyunsaturated fatty acids (LCPUFA), which are essential in fetal growth and development. Previous work suggests that high maternal body mass index (BMI) inhibits fetal LCPUFA delivery and males have greater fatty acid requirements than females during development. We hypothesized that male placental fatty acid uptake would be more sensitive to maternal BMI compared to females. METHODS Term placental samples were collected from healthy women receiving Cesarean section (n = 38). Placental fatty acid transporter and binding protein gene expression and uptake of oleic acid (OA), arachidonic acid, (AA) and docosahexanoic acid (DHA) were measured. Two-way ANOVA was used to assess the effects of fetal sex and maternal overweight/obesity (BMI >26 kg/m2). RESULTS Placental fatty acid uptake of OA was 43% lower in male offspring and 73% higher in female offspring of obese compared to normal BMI women (P < 0.05). The interaction between fetal sex and maternal BMI had a significant effect on both OA (P = 0.002) and AA uptake (P = 0.01). DHA uptake was not affected by fetal sex or maternal obesity. Placental fatty acid transporter CD36 and binding protein FABP5 gene expression levels were lower in male offspring of obese mothers but were not affected by BMI among females. CONCLUSION Maternal obesity and fetal sex significantly affect the placental uptake of oleate and arachidonate. Placental fatty acid uptake in both male and female fetuses is sensitive to maternal BMI, but males may have inadequate acquisition of the unsaturated fatty acid OA, when exposed to maternal obesity.
Collapse
Affiliation(s)
- E Brass
- Department of Obstetrics & Gynecology, Oregon Health & Science University, Portland, OR, USA.
| | | | | |
Collapse
|
3
|
Abstract
Disorders of mitochondrial DNA (mtDNA) may commonly present to primary care physicians but go undiagnosed. A 36-year-old man with a 15-year history of psychosis, seizures, and sensorineural hearing loss and a family history of diabetes mellitus and heart disease presented to our hospital without a unifying diagnosis. Physiologic, biochemical, and genetic testing revealed deficient aerobic metabolism, a defect in mitochondrial electron transport, and the presence of an A-to-G point mutation at position 3243 of the mitochondrial leucine-transfer RNA gene, establishing the diagnosis of mitochondrial encephalopathy, lactic acidosis, and strokelike syndrome (MELAS). Diagnosing mtDNA disorders requires a careful integration of clinical signs and symptoms with pedigree analysis and multidisciplinary testing. Diagnosis is important to provide genetic counseling, avoid unnecessary evaluation, and facilitate therapy for symptomatic relief.
Collapse
Affiliation(s)
- B Spellberg
- Department of Medicine, Harbor-UCLA Medical Center, 1000 W Carson St, Torrance, CA 90509, USA.
| | | | | | | |
Collapse
|