1
|
Datola A, Pistacchio A, Simone P, Colarusso L, Melchiorre M, Rinaldi G, Amidi M, Politi J, Angiuoni G. Characterization by LC-MS/MS of oxidized products identified in synthetic peptide somatostatin and cetrorelix submitted to forced oxidative stress by hydrogen peroxide: Two case studies. JOURNAL OF MASS SPECTROMETRY : JMS 2023; 58:e4919. [PMID: 37130582 DOI: 10.1002/jms.4919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/29/2023] [Accepted: 03/30/2023] [Indexed: 05/04/2023]
Abstract
In a broader scenario, the forced degradation studies provided by the ICH guidelines for Q1A, Q1B, and Q2B degradation studies allow to know the CQA of the molecule used as a drug product, to determine the appropriate analytical methods, excipients, and storage conditions ensuring the quality of the drug, its efficacy, and patient safety. In this study, we focused our attention on understanding how oxidative stress is performed by H2 O2 -impacted small synthetic peptides that do not contain residues susceptible to oxidation such as methionine. Among the amino acids susceptible to oxidation, methionine is the most reactive and depending on the structure of the protein where it is exposed, it tends to oxidize by converting into methionine sulfone or methionine sulfoxide by oxidation of its sulfur atom. Scouting experiments obtained by forced oxidative stress conditions are presented on two small synthetic peptides that do not contain any methionine residues spiked with different amounts of H2 O2 , and they are analyzed by LC-MS/MS. Less frequent oxidation products than those commonly observed on proteins/peptides-containing methionine have been characterized on both peptides. The study demonstrated that somatostatin, by means of one residue of tryptophan on the molecule, can generate traces of several oxidized products detected by UPLC-MS. Furthermore, even at a negligible level, oxidation on tyrosine and proline in cetrorelix that does not contain methionine nor tryptophan has been detected by UHPLC-MS/MS. Identification and quantification of oxidized species were achieved by high-resolution MS and MS/MS experiments. Thus, FDSs undoubtedly aid the evaluation of the CQAs as an important component of the characterization package as recommended by HAs and ICH, facilitating the understanding of unforeseen features of the studied molecule used as drugs.
Collapse
Affiliation(s)
- Antonio Datola
- Analytical Development Biotech Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Alessandra Pistacchio
- Drug Product Process Development Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Patrizia Simone
- Analytical Development Biotech Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Lucia Colarusso
- Analytical Development Biotech Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Maura Melchiorre
- Analytical Development Biotech Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Gianluca Rinaldi
- Drug Product Process Development Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Maryam Amidi
- Drug Product Process Development Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Jane Politi
- Drug Product Process Development Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| | - Gabriella Angiuoni
- Analytical Development Biotech Department, Global Healthcare Operations, EMD Serono, A business of Merck KGaA, Darmstadt, Germany Via Luigi Einaudi, 11 00012 Guidonia Montecelio, Rome, Italy
| |
Collapse
|
2
|
Choi JY, Choi CY. Gonadotropin-releasing hormone-independent effects of recombinant vertebrate ancient long opsin in the goldfish Carassius auratus reveal alternative reproduction pathways. FISH PHYSIOLOGY AND BIOCHEMISTRY 2020; 46:1219-1227. [PMID: 32146552 DOI: 10.1007/s10695-020-00784-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Vertebrate ancient long (VAL)-opsin is a green-sensitive photoreceptor that shows high sequence similarity to vertebrate ancient opsin, which is considered to play a role in sexual maturation via gonadotropin-releasing hormone (GnRH); however, the role of VAL-opsin in vertebrate sexual maturity remains unclear. Therefore, we investigated the possible role of VAL-opsin in reproduction in the goldfish Carassius auratus under a state of GnRH inhibition. Goldfish were injected with recombinant VAL-opsin protein (0.5 μg/g body mass) and/or the GnRH antagonist cetrorelix (0.5 μg/fish), and changes in the mRNA expression levels of genes associated with goldfish reproduction were measured by quantitative polymerase chain reaction, including those involved in the hypothalamus-pituitary-gonad (HPG) axis, VAL-opsin, GnRH, the gonadotropins (GTHs) luteinizing hormone and follicle-stimulating hormone, and estrogen receptor (ER). Moreover, the fish were irradiated with a green light-emitting diode (520 nm) to observe the synergistic effect on the HPG axis with VAL-opsin. Green LED exposure significantly and slightly increased the VAL-opsin and GnRH levels, respectively; however, these effects were blocked in groups injected with cetrorelix at all time points. Cetrorelix significantly decreased the mRNA levels of GTHs and ER, whereas these hormones recovered by co-treatment with VAL-opsin. These results indicate that green LED is an effective light source to promote the expression of sex hormones in fish. Moreover, VAL-opsin not only affects activity of the HPG axis but also appears to act on the pituitary gland directly to stimulate a new sexual maturation pathway that promotes the secretion of GTHs independent of GnRH.
Collapse
Affiliation(s)
- Ji Yong Choi
- Division of Marine BioScience, National Korea Maritime and Ocean University, Busan, 49112, Republic of Korea
| | - Cheol Young Choi
- Division of Marine BioScience, National Korea Maritime and Ocean University, Busan, 49112, Republic of Korea.
| |
Collapse
|