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Guillem J, Humphreys W. Spontaneous pulmonary interstitial emphysema, pneumomediastinum and cervical subcutaneous emphysema secondary to the Macklin effect in dogs with no clinical signs: 12 cases. Vet J 2024; 306:106158. [PMID: 38849024 DOI: 10.1016/j.tvjl.2024.106158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/02/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
Pneumomediastinum denotes the presence of gas within the mediastinum and generally occurs by leakage of air from an aerated viscus that traverses or abuts the mediastinal plane. The Macklin effect has been described in several veterinary studies and describes gas tracking along the perivascular interstitium following alveolar rupture causing interstitial emphysema, pneumomediastinum and subsequently cervical subcutaneous emphysema. This retrospective case series describes incidental spontaneous pulmonary interstitial emphysema, pneumomediastinum and cervical subcutaneous emphysema secondary to the Macklin effect in dogs with no related clinical signs. Twelve dogs were identified from the author's institution, of which 75 % were Sighthounds (Greyhounds, Whippets or Lurchers). Pulmonary interstitial emphysema had a predominantly paravascular distribution, although in some cases a parabronchial distribution was also identified. We conclude that incidental pulmonary interstitial emphysema, pneumomediastinum and secondary cervical subcutaneous emphysema can be incidental, presumed secondary to the Macklin effect and that Sighthound breeds may be overrepresented.
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Affiliation(s)
- J Guillem
- Institute of Veterinary & Ecological Sciences, Small Animal Teaching Hospital, University of Liverpool, Neston, UK.
| | - W Humphreys
- Institute of Veterinary & Ecological Sciences, Small Animal Teaching Hospital, University of Liverpool, Neston, UK
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Dong S, Han J, Sun XY, Zhang B, Wang W. A novel 2D g-C 3N 4 material applied for Paraquat adsorbing and detoxifying in vitro and in vivo. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 266:115594. [PMID: 37856982 DOI: 10.1016/j.ecoenv.2023.115594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/26/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
In the environmental safety area, the widespread use of the herbicide Paraquat (PQ) poses a great threat to hydrobionts and mammals. Due to the lack of specific antidote, it may lead to irreversible pulmonary fibrosis with a mortality rate of 60%. Therefore, it is necessary to develop an effective and specific PQ antidote. The g-C3N4 (HPCN) with excellent surface physicochemical properties was prepared by a two-step calcination method using urea and dicyandiamide as raw materials, showing a significant photocatalyst against environmental PQ pollution. The SEM results showed that HPCN possesses a porous layered structure. X-ray diffraction and infrared spectroscopy indicated that the conjugated aromatic rings were orderly stacked, forming a 2D layered structure of g-C3N4. The HPCN had a larger specific surface area (56.84 m2 g-1) and pore volume (0.2718 cm3 g-1), which enhanced its adsorption capacity and photocatalytic activity. HPCN exhibited an effective adsorption rate of 38.25% for PQ in water under light. Compared with the PQ group (54.8%), the cell viability of the HPCN group (91.4%) significantly increased by 36.6%, and the SEM observation revealed the restoration of normal cell morphology. The HPCN effectively reduced PQ content in zebrafish and mice in vivo, resulting in an approximately 70% increase in survival rate. The UV-Vis results indicated that the adsorption rate of HPCN for PQ in zebrafish was 43.5%. The enhanced catalytic performance of HPCN provides a promising solution for the detoxification of PQ and of other environmental pollutants.
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Affiliation(s)
- Shi Dong
- School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Shandong 257061, PR China; Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, PR China; Key Laboratory of Xinjiang Phytomedicine Resources and Utilization, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832002, PR China.
| | - Jun Han
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
| | - Xi-Yin Sun
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
| | - Bo Zhang
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, PR China.
| | - Wei Wang
- School of Chemical Engineering, Shandong Institute of Petroleum and Chemical Technology, Shandong 257061, PR China; School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, PR China.
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Ghasemi SZ, Beigoli S, Memarzia A, Behrouz S, Gholamnezhad Z, Darroudi M, Amin F, Boskabady MH. Paraquat-induced systemic inflammation and oxidative stress in rats improved by Curcuma longa ethanolic extract, curcumin and a PPAR agonist. Toxicon 2023; 227:107090. [PMID: 36965712 DOI: 10.1016/j.toxicon.2023.107090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/14/2023] [Accepted: 03/19/2023] [Indexed: 03/27/2023]
Abstract
The effect of Curcuma longa (Cl) ethanolic extract, nano-curcumin (Cu) and a PPARγ activator, pioglitazone on inhaled paraquat (PQ)-induced systemic inflammation and oxidative stress was examined in the present study. Control rats were exposed to normal saline and PQ groups to 27 and 54 mg/m3 (PQ-L and PQ-H) aerosols. Nine other PQ-H groups were treated with Curcuma longa (Cl, 150 and 600 mg/kg/day), nano-curcumin (Cu, 2 and 8 mg/kg/day), pioglitazone (Pio, 5 and 10 mg/kg), low dose of Pio + Cl and Cu and dexamethasone (0.03 mg/kg/day) for 16 days after PQ exposure period (n = 8). Total and differential WBC counts, malondialdehyde (MDA) and TNF-α levels were increased but thiol, catalase (CAT), superoxide dismutase (SOD), IL-10 and IFN-γ levels were decreased in the blood in the both PQ groups (p < 0.05 to p < 0.001). Treatment with Dexa and both doses of Cl, Cu, and Pio improved all measured variables compared to the PQ-H group (p < 0.05 to p < 0.001). The improvements of most variables in the treated group with low dose of Pio + Cl and Cu were higher than the effects of three agents alone. Systemic inflammation and oxidative stress induced by inhaled PQ were improved by Cl, Cu and Pio. In addition, a synergic effect between Pio with those of Cl and Cu was shown, suggesting PPARγ mediated effects of the plant and its derivative Cu.
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Affiliation(s)
- Seyedeh Zahra Ghasemi
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran; Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran
| | - Sima Beigoli
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran
| | - Arghavan Memarzia
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran
| | - Sepideh Behrouz
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran; Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran
| | - Zahra Gholamnezhad
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran
| | - Majid Darroudi
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Amin
- Department of Clinical Biochemistry, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Mohammad Hossein Boskabady
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran; Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 9177948564, Iran.
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Osipova I, Cassel N, Biller D. Progressive tension pneumomediastinum in an adult miniature schnauzer. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Iulia Osipova
- Department of Clinical Sciences College of Veterinary Medicine Kansas State University Manhattan Kansas USA
| | - Nicky Cassel
- Department of Clinical Sciences College of Veterinary Medicine Kansas State University Manhattan Kansas USA
| | - David Biller
- Department of Clinical Sciences College of Veterinary Medicine Kansas State University Manhattan Kansas USA
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