1.Application of HPLC and ESI-MS techniques in the analysis of phenolic acids and flavonoids from green leafy vegetables (GLVs)
Journal of Pharmaceutical Analysis 2017;7(6):349-364
Diets containing high proportions of fruits and vegetables reduce the risk of onset of chronic diseases.The role of herbal medicines in improving human health is gaining popularity over the years,which also increases the need for safety and efficiency of these products.Green leafy vegetables(GLVs)are the richest source of phenolic compounds with excellent antioxidant properties. Increased consumption of diets containing phenolic compounds may give positive and better results to human health and significantly improves the immune system.Highly selective,susceptible and versatile analytical techniques are necessary for extraction,identifica-tion, and quantification of phenolic compounds from plant extracts, which helps to utilize their important biological properties. Recent advances in the pre-treatment procedures, separation techniques and spectro-metry methods are used for qualitative and quantitative analysis of phenolic compounds.The online coupling of liquid chromatography with mass spectrometry(LC–MS)has become a useful tool in the metabolic profiling of plant samples.In this review,the separation and identification of phenolic acids and flavonoids from GLVs by LC–MS have been discussed along with the general extraction procedures and other sources of mass spectrometer used. The review is devoted to the understanding of the structural configuration, nature and accumulation pattern of phenolic acids and flavonoids in plants and to highlighting the recent developments in the chemical investigation of these compounds by chromatographic and spectroscopic techniques.It concludes with the advantages of the combination of these two methods and prospects.
2.Cytotoxic and antibacterial substances against multi-drug resistant pathogens from marine sponge symbiont:Citrinin, a secondary metabolite of Penicillium sp
Ramesh SUBRAMANI ; Rohitesh KUMAR ; Pritesh PRASAD ; William AALBERSBERG
Asian Pacific Journal of Tropical Biomedicine 2013;(4):291-296
Objective: To Isolate, purify, characterize, and evaluate the bioactive compounds from the sponge-derived fungus Penicillium sp. FF001 and to elucidate its structure. Methods: The fungal strain FF001 with an interesting bioactivity profile was isolated from a marine Fijian sponge Melophlus sp. Based on conidiophores aggregation, conidia development and mycelia morphological characteristics, the isolate FF001 was classically identified as a Penicillium sp. The bioactive compound was identified using various spectral analysis of UV, high resolution electrospray ionization mass spectra, 1H and 13C NMR spectral data. Further minimum inhibitory concentrations (MICs) assay and brine shrimp cytotoxicity assay were also carried out to evaluate the biological properties of the purified compound. Results: Bioassay guided fractionation of the EtOAc extract of a static culture of this Penicillium sp. by different chromatographic methods led the isolation of an antibacterial, anticryptococcal and cytotoxic active compound, which was identified as citrinin (1). Further, citrinin (1) is reported for its potent antibacterial activity against methicillin-resistant Staphylococcus aureus (S. aureus), rifampicin-resistant S. aureus, wild type S. aureus and vancomycin-resistant Enterococcus faecium showed MICs of 3.90, 0.97, 1.95 and 7.81 μg/mL, respectively. Further citrinin (1) displayed significant activity against the pathogenic yeast Cryptococcus neoformans (MIC 3.90 μg/mL), and exhibited cytotoxicity against brine shrimp larvae LD50 of 96 μg/mL. Conclusions: Citrinin (1) is reported from sponge associated Penicillium sp. from this study and for its strong antibacterial activity against multi-drug resistant human pathogens including cytotoxicity against brine shrimp larvae, which indicated that sponge associated Penicillium spp. are promising sources of natural bioactive metabolites.
3.Double level Chance-type fractures of spine in ankylosing spondylitis
Vargaonkar Shantaram GAURESH ; Singh Kumar VARUN ; Kashyap ABHISHEK ; Kumar RAMESH
Chinese Journal of Traumatology 2014;(6):361-363
Chance fractures are usually associated with seat belt injuries. Mechanism is always related to flexion-distraction at vertebral level. Double level Chance-type fractures have rarely been reported in published literature. We presented such a fracture at D10 and L3 level in a 38-year-old patient with ankylosing spondylitis. Management was done with posterior decompression and short segment fixation separately.
4.Quality of life following total hip arthroplasty in patients with acetabular fractures, previously managed by open reduction and internal fixation.
Prasoon KUMAR ; Ramesh-Kumar SEN ; Vishal KUMAR ; Ankit DADRA
Chinese Journal of Traumatology 2016;19(4):206-208
PURPOSETotal hip replacement (THR) is one of the most successful and cost-effective surgical procedures and remains the treatment of choice for long-term pain relief and restoration of function for patients with diseased or damaged hips. Acetabular fractures managed either conservatively or operatively by fixation tend to present later with secondary joint changes that require THR. In this study we evaluated the functional outcome and quality of life achieved by such patients.
METHODSOur study was carried out as a retrospective trial by recruiting patients who underwent THR from June 2006 to May 2012. A total of 32 patients were included with a mean age of 46.08 years ranging from (25-65) years. We evaluated the quality of life in the patients using scoring techniques of Short Musculoskeletal Functional Assessment (SMFA) and the 12-Item Short Form Health Survey (SF-12). Functional outcome was assessed using Harris Hip Score (HHS).
RESULTSThe mean HHS of the patients was 84.3 with a range from 56 to 100. The SMFA averaged 13.3. The SF-12 score averaged 49.1. The correlation of the HHS with SF-12 was positive (p =0.001) while with SMFA there was a negative correlation (p =0.001).
CONCLUSIONFrom this study it is inferred that the functional outcome of THR and quality of life in patients who had acetabular fractures and were initially managed by open reduction and internal fixation is good.
Acetabulum ; injuries ; Adult ; Aged ; Arthroplasty, Replacement, Hip ; Female ; Fracture Fixation, Internal ; Fractures, Bone ; physiopathology ; psychology ; surgery ; Humans ; Male ; Middle Aged ; Quality of Life ; Retrospective Studies ; Treatment Outcome
5.Selective separation, detection of zotepine and mass spectral characterization of degradants by LC-MS/MS/QTOF
Talluri Kumar M.V.N. ; Kandimalla Reddy Naveen ; Bandu Raju ; Chundi Divya ; Marupaka Ramesh ; Srinivas Ragampeta
Journal of Pharmaceutical Analysis 2014;(2):107-116
A simple, precise, accurate stability-indicating gradient reversed-phase high-performance liquid chromatographic (RP-HPLC) method was developed for the quantitative determination of zotepine (ZTP) in bulk and pharmaceutical dosage forms in the presence of its degradation products (DPs). The method was developed using Phenomenex C18 column (250 mm ~ 4.6 mm i.d., 5 mm) with a mobile phase containing a gradient mixture of solvents, A (0.05%trifluoroacetic acid (TFA), pH ? 3.0) and B (acetonitrile). The eluted compounds were monitored at 254 nm;the run time was within 20.0 min, in which ZTP and its DPs were well separated, with a resolution of 41.5. The stress testing of ZTP was carried out under acidic, alkaline, neutral hydrolysis, oxidative, photolytic and thermal stress conditions. ZTP was found to degrade significantly in acidic, photolytic, thermal and oxidative stress conditions and remain stable in basic and neutral conditions. The developed method was validated with respect to specificity, linearity, limit of detection, limit of quantification, accuracy, precision and robustness as per ICH guidelines. This method was also suitable for the assay determination of ZTP in pharmaceutical dosage forms. The DPs were characterized by LC-MS/MS and their fragmentation pathways were proposed.
6.Double level Chance-type fractures of spine in ankylosing spondylitis.
Gauresh Shantaram VARGAONKAR ; Varun Kumar SINGH ; Abhishek KASHYAP ; Ramesh KUMAR
Chinese Journal of Traumatology 2014;17(6):361-363
Chance fractures are usually associated with seat belt injuries. Mechanism is always related to flexion-distraction at vertebral level. Double level Chance-type fractures have rarely been reported in published literature. We presented such a fracture at D10 and L3 level in a 38-year-old patient with ankylosing spondylitis. Management was done with posterior decompression and short segment fixation separately.
Adult
;
Fracture Fixation
;
methods
;
Humans
;
Spinal Fractures
;
therapy
;
Spondylitis, Ankylosing
;
complications
7.Simultaneous bilateral anterior shoulder dislocation: report of two cases and review of the literature.
Sujit-Kumar TRIPATHY ; Ramesh-Kumar SEN ; Sameer AGGARWAL ; Sarvdeep-Singh DHATT ; Naveen TAHASILDAR
Chinese Journal of Traumatology 2011;14(5):312-315
Bilateral shoulder dislocations are rare and almost always occur in the posterior direction. Simultaneous bilateral anterior shoulder dislocation is even rarer and only a few cases are stated in the literature. The most interesting part of a bilateral shoulder dislocation is about its injury mechanism as a synchronous and simultaneous force is needed to result in it. In cases of epilepsy or electrocution, the mechanism is different and the forceful contractions of the selective group of muscles result in the dislocation. This article reports two cases of bilateral simultaneous anterior shoulder joint dislocation that occurred after a road side accident and after an episode of convulsion in an epileptic patient. The dislocations were diagnosed early and reduced immediately with a proper postreduction rehabilitation. During their follow-up, both patients had sa-tisfactory functional outcome. This article emphasizes on the importance of shoulder examination in road side accident victims and epileptic patients. All orthopedic surgeons and emergency physicians should be aware of such unusual possibilities to have an early diagnosis and treatment. An early reduction and appropriate rehabilitation can provide satisfactory functional outcome. This article also briefly discusses the injury mechanisms, diagnoses and treatments of bilateral shoulder dislocation as reported in the literature.
Humans
;
Joint Dislocations
;
Shoulder Dislocation
;
therapy
8.Long term surgical treatment outcome of talar body fracture.
Ramesh-Kumar SEN ; Sujit-Kumar TRIPATHY ; Shakthivel-Rr MANOHARAN ; Vibhu KRISHNAN ; Tajir TAMUK ; Vanyambadi JAGADEESH
Chinese Journal of Traumatology 2011;14(5):282-287
OBJECTIVETalar body fractures are rare and have poor treatment outcome. The purpose of this study is to report the long term surgical treatment outcome of closed talar dome fractures.
METHODSEight closed talar body fractures, treated by open reduction and internal fixation with small fragment cancellous screws and/or Herbert screws in our level I trauma centre were retrospectively analyzed. Preoperative and postoperative radiographs of the foot (antero-posterior, lateral and oblique views) and ankle (antero-posterior, lateral and mortise views) were obtained. The patients were followed up both radiologically and functionally (foot function index, FFI) after 3 weeks, 6 weeks, 3 months, 6 months and then annually.
RESULTSThere were five crush fractures and three shear fractures (two sagittal shear and one coronal shear), with average follow-up of 5 years. No early complications were noticed in these patients. Late complications included osteoarthrosis of subtalar/ankle joints in six patients and osteonecrosis of talar body in four patients. On functional assessment, mean FFI after 5 years was 104.63 points and worse outcome was noticed in crush injury and coronal shear fractures. Sagittal shear fractures had a good functional and radiological outcome.
CONCLUSIONSLate complications subsequent to surgically treated talar body fractures are inevitable, even though exact reduction and rigid fixation are achieved, thus patients are supposed to be counseled about the adverse outcome. Although crush and coronal shear fractures have poor outcome, sagittal injuries have good prognosis on long term evaluation.
Ankle Joint ; Fracture Fixation, Internal ; Fractures, Bone ; surgery ; Humans ; Talus ; injuries ; Treatment Outcome
9.Ipsilateral fracture dislocations of the hip and knee joints with contralateral open fracture of the leg: a rare case and its management principles.
Ramesh-Kumar SEN ; Sujit-Kumar TRIPATHY ; Vibhu KRISHNAN ; Tarun GOYAL ; Vanyambadi JAGADEESH
Chinese Journal of Traumatology 2011;14(3):183-187
This paper discussed the injury mechanism and management of a patient who had concomitant ipsilateral hip and knee dislocations and contralateral open leg fracture. A 32-year-old man presented with ipsilateral fracture-dislocations of the left hip (Pipkin's type IV) and knee (Moore II) joints and contralateral open fracture of the leg bones after a car accident. After emergency resuscitative measures, the hip joint was reduced and Pipkin's fracture was fixed using Ganz approach with lag screws; knee joint was reduced closely and tibial plateau fracture was stabilized with lateral buttress plate and a transarticular spanning fixator. The open fracture on the other leg was debrided and fixed with an external fixator. There was no instability in both joints after fixation when he was examined under anesthesia. The fractures united after 3 months and the patient had no residual instability of hip and knee. There was no clinical or radiological evidence of osteonecrosis in the hip joint after 6 months. At one-year follow-up, he had satisfactory functional outcome with almost normal range of motion at both joints. Ipsilateral hip and knee dislocations are rare injuries and more caution is needed for early diagnosis. A timely appropriate intervention can provide good functional outcome to the patient in this situation.
Adult
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Fractures, Open
;
surgery
;
Hip Dislocation
;
surgery
;
Humans
;
Knee Dislocation
;
surgery
;
Leg Injuries
;
surgery
;
Male
;
Tomography, X-Ray Computed
10.Three-dimensional computer navigation in the reconstruction of complex unilateral orbital fractures: evaluation and review of applications
Parampreet Singh SAINI ; Rajesh KUMAR ; Manu SAINI ; Tarush GUPTA ; Sunil GABA ; Ramesh Kumar SHARMA
Archives of Craniofacial Surgery 2024;25(4):161-170
Background:
The eyes are the central aesthetic unit of the face. Maxillofacial trauma can alter facial proportions and affect visual function with varying degrees of severity. Conventional approaches to reconstruction have numerous limitations, making the process challenging. The primary objective of this study was to evaluate the application of three-dimensional (3D) navigation in complex unilateral orbital reconstruction.
Methods:
A prospective cohort study was conducted over 19 months (January 2020 to July 2021), with consecutive enrollment of 12 patients who met the inclusion criteria. Each patient was followed for a minimum period of 6 months. The principal investigator carried out a comparative analysis of several factors, including fracture morphology, orbital volume, globe projection, diplopia, facial morphic changes, lid retraction, and infraorbital nerve hypoesthesia.
Results:
Nine patients had impure orbital fractures, while the remainder had pure fractures. The median orbital volume on the normal side (30.12 cm3; interquartile range [IQR], 28.45–30.64) was comparable to that of the reconstructed orbit (29.67 cm3; IQR, 27.92–31.52). Diplopia improved significantly (T(10) = 2.667, p = 0.02), although there was no statistically significant improvement in globe projection. Gross symmetry of facial landmarks was achieved, with comparable facial width-to-height ratio and palpebral fissure lengths. Two patients reported infraorbital hypoesthesia at presentation, which persisted at the 6-month follow-up. Additionally, five patients developed lower lid retraction (1–2 mm), and one experienced implant impingement at the infraorbital border.
Conclusion
Our study provides level II evidence supporting the use of 3D navigation to improve surgical outcomes in complex orbital reconstruction.