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Roy T, Boateng ST, Uddin MB, Banang-Mbeumi S, Yadav RK, Bock CR, Folahan JT, Siwe-Noundou X, Walker AL, King JA, Buerger C, Huang S, Chamcheu JC. The PI3K-Akt-mTOR and Associated Signaling Pathways as Molecular Drivers of Immune-Mediated Inflammatory Skin Diseases: Update on Therapeutic Strategy Using Natural and Synthetic Compounds. Cells 2023; 12:1671. [PMID: 37371141 PMCID: PMC10297376 DOI: 10.3390/cells12121671] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
The dysregulated phosphatidylinositol-3-kinase (PI3K)-Akt-mammalian target of rapamycin (mTOR) signaling pathway has been implicated in various immune-mediated inflammatory and hyperproliferative dermatoses such as acne, atopic dermatitis, alopecia, psoriasis, wounds, and vitiligo, and is associated with poor treatment outcomes. Improved comprehension of the consequences of the dysregulated PI3K/Akt/mTOR pathway in patients with inflammatory dermatoses has resulted in the development of novel therapeutic approaches. Nonetheless, more studies are necessary to validate the regulatory role of this pathway and to create more effective preventive and treatment methods for a wide range of inflammatory skin diseases. Several studies have revealed that certain natural products and synthetic compounds can obstruct the expression/activity of PI3K/Akt/mTOR, underscoring their potential in managing common and persistent skin inflammatory disorders. This review summarizes recent advances in understanding the role of the activated PI3K/Akt/mTOR pathway and associated components in immune-mediated inflammatory dermatoses and discusses the potential of bioactive natural products, synthetic scaffolds, and biologic agents in their prevention and treatment. However, further research is necessary to validate the regulatory role of this pathway and develop more effective therapies for inflammatory skin disorders.
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Affiliation(s)
- Tithi Roy
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Samuel T. Boateng
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Mohammad B. Uddin
- Department of Toxicology and Cancer Biology, Center for Research on Environmental Diseases, College of Medicine, University of Kentucky, Lexington, KY 40536, USA;
| | - Sergette Banang-Mbeumi
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
- Division for Research and Innovation, POHOFI Inc., Madison, WI 53744, USA
- School of Nursing and Allied Health Sciences, Louisiana Delta Community College, Monroe, LA 71203, USA
| | - Rajesh K. Yadav
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Chelsea R. Bock
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Joy T. Folahan
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Xavier Siwe-Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa;
| | - Anthony L. Walker
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
| | - Judy A. King
- Department of Pathology and Translational Pathobiology, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA 71103, USA;
- College of Medicine, Belmont University, 900 Belmont Boulevard, Nashville, TN 37212, USA
| | - Claudia Buerger
- Department of Dermatology, Venerology and Allergology, Clinic of the Goethe University, 60590 Frankfurt am Main, Germany;
| | - Shile Huang
- Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130, USA;
- Department of Hematology and Oncology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130, USA
- Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center, Shreveport, LA 71130, USA
| | - Jean Christopher Chamcheu
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209, USA; (T.R.); (S.T.B.); (S.B.-M.); (R.K.Y.); (C.R.B.); (J.T.F.); (A.L.W.)
- Department of Pathology and Translational Pathobiology, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA 71103, USA;
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Fan TWM, Daneshmandi S, Cassel TA, Uddin MB, Sledziona J, Thompson PT, Lin P, Higashi RM, Lane AN. Polarization and β-Glucan Reprogram Immunomodulatory Metabolism in Human Macrophages and Ex Vivo in Human Lung Cancer Tissues. J Immunol 2022; 209:1674-1690. [PMID: 36150727 PMCID: PMC9588758 DOI: 10.4049/jimmunol.2200178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 08/23/2022] [Indexed: 11/06/2022]
Abstract
Immunomodulatory (IM) metabolic reprogramming in macrophages (Mϕs) is fundamental to immune function. However, limited information is available for human Mϕs, particularly in response plasticity, which is critical to understanding the variable efficacy of immunotherapies in cancer patients. We carried out an in-depth analysis by combining multiplex stable isotope-resolved metabolomics with reversed phase protein array to map the dynamic changes of the IM metabolic network and key protein regulators in four human donors' Mϕs in response to differential polarization and M1 repolarizer β-glucan (whole glucan particles [WGPs]). These responses were compared with those of WGP-treated ex vivo organotypic tissue cultures (OTCs) of human non-small cell lung cancer. We found consistently enhanced tryptophan catabolism with blocked NAD+ and UTP synthesis in M1-type Mϕs (M1-Mϕs), which was associated with immune activation evidenced by increased release of IL-1β/CXCL10/IFN-γ/TNF-α and reduced phagocytosis. In M2a-Mϕs, WGP treatment of M2a-Mϕs robustly increased glucose utilization via the glycolysis/oxidative branch of the pentose phosphate pathway while enhancing UDP-N-acetyl-glucosamine turnover and glutamine-fueled gluconeogenesis, which was accompanied by the release of proinflammatory IL-1β/TNF-α to above M1-Mϕ's levels, anti-inflammatory IL-10 to above M2a-Mϕ's levels, and attenuated phagocytosis. These IM metabolic responses could underlie the opposing effects of WGP, i.e., reverting M2- to M1-type immune functions but also boosting anti-inflammation. Variable reprogrammed Krebs cycle and glutamine-fueled synthesis of UTP in WGP-treated OTCs of human non-small cell lung cancer were observed, reflecting variable M1 repolarization of tumor-associated Mϕs. This was supported by correlation with IL-1β/TNF-α release and compromised tumor status, making patient-derived OTCs unique models for studying variable immunotherapeutic efficacy in cancer patients.
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Affiliation(s)
- Teresa W-M Fan
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY;
- Markey Cancer Center, University of Kentucky, Lexington, KY; and
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY
| | - Saeed Daneshmandi
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - Teresa A Cassel
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - Mohammad B Uddin
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - James Sledziona
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - Patrick T Thompson
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - Penghui Lin
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
| | - Richard M Higashi
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY
- Markey Cancer Center, University of Kentucky, Lexington, KY; and
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY
| | - Andrew N Lane
- Center for Environmental and Systems Biochemistry, University of Kentucky, Lexington, KY;
- Markey Cancer Center, University of Kentucky, Lexington, KY; and
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY
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Fan TWM, Daneshmandi S, Cassel TA, Uddin MB, Sledziona J, Thompson PT, Lin P, Higashi RM, Lane AN. Abstract 2537: Beta-glucan reprograms immunomodulatory metabolism in human macrophage and ex vivo in lung cancer tissues. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-2537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
We combined multiplex Stable Isotope-Resolved Metabolomics (mSIRM) with Reverse Phase Protein Array (RPPA) to map the time course changes of IM metabolic network and key protein regulators in four human donors’ MΦ’s in response to differential polarization and whole glucan particulates (WGP) treatments. We found consistent and plastic network responses to polarization durations and WGP treatments compared to those of the mouse counterparts. Consistent responses included enhanced 15N2-tryptophan catabolism to quinolinate, 2H2-glucose oxidation to ribose/ribulose-5-phosphate, and conversion of 13C5-glutamine to itaconate in response to pro-inflammatory (M1) versus anti-inflammatory (M2) stimuli. WGP robustly induced the buildup of 2H2-glucose-derived 6-phosphogluconate, -lactate, and -IMP, 13C5-glutamine-derived fructose-1,6-bisphosphate, and increased enrichment of 2H-labeled UDP-N-acetylglucosamine in M2-MΦ’s. However, the Krebs cycle activity was variably enhanced by M2 stimuli or WGP treatment. The consistent effects were related to increased release of proinflammatory IM effectors IL-1β/CXCL10/IFNγ/TNFα by M1-MΦ’s and enhanced release of IL-1β/TNFα to above M1-MΦ’s levels in WGP-treated M2-MΦ’s while boosting the latter in anti-inflammatory IL-10 release and maintenance of NAD+ synthesis. They were also related to lower phagocytosis in M1-MΦ’s and WGP-treated M2-MΦ’s versus M2-MΦ’s. Together with the expression changes of key protein regulators, we suggest enhanced tryptophan catabolism with blocked NAD+ and UTP synthesis to be key to the consistent changes in immune functions in response to M1 stimuli. Likewise, increased glucose utilization via glycolysis and the oxidative branch of the pentose phosphate pathway, and blockade of glutamine-fueled N-linked glycosylation could be linked to reversion of M2 to M1-type immune functions. Reprogrammed Krebs cycle and glutamine conversion to UTP occurred variably in WGP-treated ex vivo organotypic tissue cultures (OTCs) of human non-small cell lung cancer (NSCLC), which could reflect variable M1 repolarization of tumor associated MΦ’s. This in turn correlated with IL-1β/TNFα releases and compromised tumor status, making patient-derived OTCs a unique model for studying variable immunotherapeutic efficacy in cancer patients. In conclusion, consistent and variable IM metabolic responses were evident in four human donors’ MΦ’s. WGP repolarized some M2 to M1-type responses while boosting other M2-type responses. NSCLC OTCs from six patients showed variable M1 repolarization in response to WGP.
Citation Format: Teresa W. M. Fan, Saeed Daneshmandi, Teresa A. Cassel, Mohammad B. Uddin, James Sledziona, Patrick T. Thompson, Penghui Lin, Richard M. Higashi, Andrew N. Lane. Beta-glucan reprograms immunomodulatory metabolism in human macrophage and ex vivo in lung cancer tissues [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 2537.
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Uddin MB, Roy KR, Hill RA, Roy SC, Gu X, Li L, Zhang QJ, You Z, Liu YY. p53 missense mutant G242A subverts natural killer cells in sheltering mouse breast cancer cells against immune rejection. Exp Cell Res 2022; 417:113210. [PMID: 35597298 DOI: 10.1016/j.yexcr.2022.113210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 05/07/2022] [Accepted: 05/14/2022] [Indexed: 11/15/2022]
Abstract
Cancer cells acquire immunoediting ability to evade immune surveillance and thus escape eradication. It is widely known that mutant proteins encoded from tumor suppressor TP53 exhibit gain-of-function in cancer cells, thereby promoting progression; however, how mutant p53 contributes to the sheltering of cancer cells from host anticancer immunity remains unclear. Herein, we report that murine p53 missense mutation G242A (corresponding to human G245A) suppresses the activation of host natural killer (NK) cells, thereby enabling breast cancer cells to avoid immune assault. We found that serial injection of EMT6 breast cancer cells that carry wild-type (wt) Trp53, like normal fibroblasts, promoted NK activity in mice, while SVTneg2 cells carrying Trp53 G242A+/+ mutation decreased NK cell numbers and increased CD8+ T lymphocyte numbers in spleen. Innate immunity based on NK cells and CD8 T cells was reduced in p53 mutant-carrying transgenic mice (Trp53 R172H/+, corresponding to human R175H/+). Further, upon co-culture with isolated NK cells, EMT6 cells substantively activated NK cells and proliferation thereof, increasing interferon-gamma (IFN-γ) production; however, SVTneg2 cells suppressed NK cell activation. Further mechanistic study elucidated that p53 can modulate expression by cancer cells of Mult-1 and H60a, which are activating and inhibitory ligands for NKG2D receptors of NK cells, respectively, to enhance immune surveillance against cancer. Our findings demonstrate that wt p53 is requisite for NK cell-based immune recognition and elimination of cancerous cells, and perhaps more importantly, that p53 missense mutant presence in cancer cells impairs NK cell-attributable responses, thus veiling cancerous cells from host immunity and enabling cancer progression.
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Affiliation(s)
- Mohammad B Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Kartik R Roy
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Ronald A Hill
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sagor C Roy
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Xin Gu
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Li Li
- Laboratory of Translational Cancer Research, Tom & Gayle Benson Cancer Center, Ochsner Clinic Foundation, New Orleans, LA, USA
| | - Qian-Jin Zhang
- Department of Biology, Xavier University of Louisiana, New Orleans, LA, USA
| | - Zongbing You
- Department of Structural and Cellular Biology, Tulane University, New Orleans, LA, USA
| | - Yong-Yu Liu
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA, USA.
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Abstract
OBJECTIVE Sleep apnea significantly decreases the quality of life. The apnea hypopnea index (AHI) is the main indicator for sleep apnea diagnosis. This study explored a novel automatic algorithm to diagnose sleep apnea from nasal airflow (AF) and pulse oximetry (SpO2) signals. APPROACH Of the 988 polysomnography (PSG) records from the sleep heart health study (SHHS), 45 were randomly selected for the development of an algorithm and the remainder for validation (n = 943). The algorithm detects apnea events by a digitization process, following the determination of the peak excursion (peak-to-trough amplitude) from AF envelope. Hypopnea events were determined from the AF envelope and oxygen desaturation with correction to time lag in SpO2. Total sleep time (TST) was estimated from an optimized percentage of artefact-free total recording time. AHI was estimated from the number of detected events divided by the estimated TST. The estimated AHI was compared to the scored SHHS data for performance evaluation. MAIN RESULTS The validation showed good agreement between the estimated and scored AHI (intraclass correlation coefficient of 0.95 and mean ±95% limits of agreement of -1.6 ±12.5 events h-1). The diagnostic accuracies were found: 90.7%, 91%, and 96.7% for AHI cut-off ≥5, ≥15, and ≥30 respectively. SIGNIFICANCE The new algorithm is accurate over other existing methods for the automatic diagnosis of sleep apnea. It is applicable to any portable sleep screeners especially for the home diagnosis of sleep apnea.
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Affiliation(s)
- M B Uddin
- School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, Australia.,Centre for Health Technologies, University of Technology Sydney, Sydney, Australia
| | - C M Chow
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.,Sleep Research Group, Charles Perkins Centre, The University of Sydney, Sydney, Australia
| | - S H Ling
- School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, Australia.,Centre for Health Technologies, University of Technology Sydney, Sydney, Australia
| | - S W Su
- School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, Australia.,Centre for Health Technologies, University of Technology Sydney, Sydney, Australia
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Mahmud AA, Khan N, Islam MS, Islam S, Bari MS, Das SC, Uddin MB, Kamal MZ, Banu NR, Akhtaruzzaman M, Azim A. Anorectal Malformations and Associated Anomalies in Children. Mymensingh Med J 2021; 30:62-68. [PMID: 33397852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Anorectal malformations (ARM) incorporate a broad spectrum of diseases, can affect both sexes, and involve the distal anus and rectum as well as the uro-genital tracts. Defects range from the minor which can be treated easily with an excellent outcome, to those are complex and often associated with other anomalies are difficult to manage with poor functional prognosis. This study was done to observe the hospital incidence of Anorectal malformations, frequency of types, sex distribution and spectrum of associations with ARM. The effects of presence of associated anomalies on morbidity and mortality also observed. Detailed history, clinical examinations and relevant investigations were performed for the primary and as well as the associated anomalies. A total of 80 patients were admitted in the department of pediatric surgery in Mymensingh Medical College Hospital during the period of June 2016 to May 2017. Age of the patients was ranging from 1-180 days with the mean age of 0.49±1.002 months. Male: Female ratio was 1.6: 1. Among them 48(60%) were high and 32(40%) were low variety of ARM. In male 37(46.2%) had high and 13(13.7%) were low variety whereas in female 11(13.7%) were high and 19(23.7%) had low ARM. Associated anomalies were seen in 25(31.2%) patient -18 in males and 7 in females; 20 in high and 5 in low ARM. Associated anomalies were uro-genital 11(13.8%), cardiovascular 10(12.5%), vertebral 4(5%), limb defects 3(3.5%) and others 2(2.5%). Four patients have more than one anomaly. Anorectal malformations occur more in boys than girls. Males were more likely to have high lesions and without fistula was the common defect. Low variety ARM were found more in females with Anovestibular fistula is the commonest defect. The most common associated anomalies were recto urinary fistula (13.8%). Associations were more in high than low ARM but not significant (p>0.05). Post operative complications were more in high ARM in both sexes with associated anomalies. The effects of types and associations on morbidity and mortality were significantly different (p<0.05).
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Affiliation(s)
- A A Mahmud
- Dr Md Abdullah Al Mahmud, Assistant Professor, Department of Pediatric Surgery, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Roy KR, Uddin MB, Roy SC, Hill RA, Marshall J, Li Y, Chamcheu JC, Lu H, Liu Y. Gb3-cSrc complex in glycosphingolipid-enriched microdomains contributes to the expression of p53 mutant protein and cancer drug resistance via β-catenin-activated RNA methylation. FASEB Bioadv 2020; 2:653-667. [PMID: 33205006 PMCID: PMC7655095 DOI: 10.1096/fba.2020-00044] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022] Open
Abstract
Glucosylceramide synthase (GCS) is a key enzyme catalyzing ceramide glycosylation to generate glucosylceramide (GlcCer), which in turn serves as the precursor for cells to produce glycosphingolipids (GSLs). In cell membranes, GSLs serve as essential components of GSL-enriched microdomains (GEMs) and mediate membrane functions and cell behaviors. Previous studies showed that ceramide glycosylation correlates with upregulated expression of p53 hotspot mutant R273H and cancer drug resistance. Yet, the underlying mechanisms remain elusive. We report herewith that globotriaosylceramide (Gb3) is associated with cSrc kinase in GEMs and plays a crucial role in modulating expression of p53 R273H mutant and drug resistance. Colon cancer cell lines, either WiDr homozygous for missense-mutated TP53 (R273H+/+) or SW48/TP53-Dox bearing heterozygous TP53 mutant (R273H/+), display drug resistance with increased ceramide glycosylation. Inhibition of GCS with Genz-161 (GENZ 667161) resensitized cells to apoptosis in these p53 mutant-carrying cancer cells. Genz-161 effectively inhibited GCS activity, and substantially suppressed the elevated Gb3 levels seen in GEMs of p53-mutant cells exposed to doxorubicin. Complex formation between Gb3 and cSrc in GEMs to activate β-catenin was detected in both cultured cells and xenograft tumors. Suppression of ceramide glycosylation significantly decreased Gb3-cSrc in GEMs, β-catenin, and methyltransferase-like 3 for m6A RNA methylation, thus altering pre-mRNA splicing, resulting in upregulated expression of wild-type p53 protein, but not mutants, in cells carrying p53 R273H. Altogether, increased Gb3-cSrc complex in GEMs of membranes in response to anticancer drug induced cell stress promotes expression of p53 mutant proteins and accordant cancer drug resistance.
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Affiliation(s)
- Kartik R. Roy
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Mohammad B. Uddin
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Sagor C. Roy
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Ronald A. Hill
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - John Marshall
- Department of Rare Genetic Disease ResearchSanofi‐Genzyme R&D CenterGenzyme, FraminghamMassachusettsUSA
| | - Yu‐Teh Li
- Department of Biochemistry and Molecular BiologyTulane University School of MedicineNew OrleansLouisianaUSA
| | - Jean Christopher Chamcheu
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Hua Lu
- Department of Biochemistry and Molecular BiologyTulane University School of MedicineNew OrleansLouisianaUSA
| | - Yong‐Yu Liu
- School of Basic Pharmaceutical and Toxicological SciencesCollege of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
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Khiste SK, Liu Z, Roy KR, Uddin MB, Hosain SB, Gu X, Nazzal S, Hill RA, Liu YY. Ceramide-Rubusoside Nanomicelles, a Potential Therapeutic Approach to Target Cancers Carrying p53 Missense Mutations. Mol Cancer Ther 2019; 19:564-574. [PMID: 31645443 DOI: 10.1158/1535-7163.mct-19-0366] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/24/2019] [Accepted: 10/14/2019] [Indexed: 12/15/2022]
Abstract
Ceramide (Cer) is an active cellular sphingolipid that can induce apoptosis or proliferation-arrest of cancer cells. Nanoparticle-based delivery offers an effective approach for overcoming bioavailability and biopharmaceutics issues attributable to the pronounced hydrophobicity of Cer. Missense mutations of the protein p53, which have been detected in approximately 42% of cancer cases, not only lose the tumor suppression activity of wild-type p53, but also gain oncogenic functions promoting tumor progression and drug resistance. Our previous works showed that cellular Cer can eradicate cancer cells that carry a p53 deletion-mutation by modulating alternative pre-mRNA splicing, restoring wild-type p53 protein expression. Here, we report that new ceramide-rubusoside (Cer-RUB) nanomicelles considerably enhance Cer in vivo bioavailability and restore p53-dependent tumor suppression in cancer cells carrying a p53 missense mutation. Natural RUB encapsulated short-chain C6-Cer so as to form Cer-RUB nanomicelles (∼32 nm in diameter) that substantially enhanced Cer solubility and its levels in tissues and tumors of mice dosed intraperitoneally. Intriguingly, Cer-RUB nanomicelle treatments restored p53-dependent tumor suppression and sensitivity to cisplatin in OVCAR-3 ovarian cancer cells and xenograft tumors carrying p53 R248Q mutation. Moreover, Cer-RUB nanomicelles showed no signs of significant nonspecific toxicity to noncancerous cells or normal tissues, including bone marrow. Furthermore, Cer-RUB nanomicelles restored p53 phosphorylated protein and downstream function to wild-type levels in p53 R172H/+ transgenic mice. Altogether, this study, for the first time, indicates that natural Cer-RUB nanomicelles offer a feasible approach for efficaciously and safely targeting cancers carrying p53 missense mutations.
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Affiliation(s)
- Sachin K Khiste
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana
| | - Zhijun Liu
- School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana
| | - Kartik R Roy
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana
| | - Mohammad B Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana
| | - Salman B Hosain
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana
| | - Xin Gu
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, Louisiana
| | - Sami Nazzal
- Department of Pharmaceutical Sciences, Texas Tech University Health Science Center, Dallas, Texas
| | - Ronald A Hill
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana
| | - Yong-Yu Liu
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, Louisiana.
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Quddus AR, Islam MN, Uddin MB, Mahmud AA, Badruzzaman M, Saha SK, Sattar S, Afreen KF. Study of Risk Factors, Causative Organisms & Their Sensitivity Pattern in Neonatal Sepsis in a Community Based Tertiary Level Hospital. Mymensingh Med J 2019; 28:839-848. [PMID: 31599249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Neonatal sepsis is one of the most common reasons for admission to neonatal units in developing countries. It is also a major cause of mortality in both developed and developing countries. The type and pattern of organisms that cause neonatal sepsis changes over time and vary from one hospital to another hospital, even in the same country. In addition the causative organisms have developed increased drug resistance for the last two decades. Maternal, neonatal and environmental risk factors have contributed for the development of sepsis. To study the risk factors, causative organism and bacterial sensitivity pattern in cases of neonatal sepsis. This cross-sectional study was conducted over a period of six months. The study included 100 patients admitted at the neonatal ward of Department of Pediatrics, Community Based Medical College Bangladesh, Mymensingh, Bangladesh. Blood samples for culture were taken aseptically before starting antibiotic therapy. Microorganisms were isolated and identified by standard microbiological processes and antimicrobial sensitivity patterns were performed against amikacin, gentamicin, ceftriaxone, ciprofloxacin and ceftazidime. The factors which carried a significant risk for development of neonatal sepsis were low birth weight, preterm neonates, meconium stained liquor and prolonged rupture of membrane (>18 hours). Gram negative organisms predominated (68.8%) with Escherichia coli (33.3%) being the commonest. The gram negative bacteria which were isolated sensitive to amikacin, gentamicin and ceftriaxone. The organisms also relatively more sensitive to ciprofloxacin and highly sensitive to ceftazidime. The Gram positive bacteria showed sensitivity against only the antibiotic Ceftriaxone and Ciprofloxacin. The overall mortality was 9%. The outcome of the study will contribute to preventing and treating neonatal sepsis in the hospital.
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Affiliation(s)
- A R Quddus
- Dr ASM Ruhul Quddush, Associate Professor, Department of Pediatrics, Community Based Medical College, Mymensingh, Bangladesh
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Karim SN, Saleh FM, Uddin MB, Biswas P, Hossain AI, Eunus MF, Afreen KF. Assessment of Number and Distribution of Mast Cell in Oral Squamous Cell Carcinoma in Biopsy Specimen and Its Correlation with Histological Grading. Mymensingh Med J 2019; 28:553-561. [PMID: 31391426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Oral cancer is a commonly occurring one worldwide. More than 90% of all oral cancers are squamous cell carcinoma (SCC). The molecular biological markers of oral SCC have been extensively studied to aid in prevention and prognosis. However, no marker has been universally accepted so far. Mast cells are important component of cancer stromal interaction. Their early recruitment in tumor microenvironment and multifarious function make them a burning topic of interest in the field of research. So mast cell may act as a new target for the adjuvant treatment of oral SCC. Therefore, the aim of the study was to compare the number and distribution of mast cell between different grades of oral SCC. In this cross sectional study the sample size was 100. After routine tissue processing and staining with Hematoxylin & Eosin (H/E) stains, slides of all cases were grouped as- well, moderate and poorly differentiated invasive squamous cell carcinoma according to Anneroth's grading system. Identification of mast cell was done by Toluidine blue stain. Distribution of mast cells was observed and number of mast cells was counted. The data was tabulated and statistical analysis was performed. Out of 100 cases, 66% patients belonged to Grade I, 28% Grade II and 6% Grade III. The mean±SD number of mast cells was 3.28±1.21, 1.59±0.58 and 0.44±0.17 in Grade I, Grade II and Grade III SCC, respectively. The p value was found to be highly significant (p<0.001). An inverse significant Pearson's correlation was found between number of mast cells and grades of oral SCC. The number of mast cell was slightly increased in oral SCC cases than normal. The number of mast cells also had an inverse association with histologic grade. So, in this observation mast cell is a good cellular indicator of tumor grade.
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Affiliation(s)
- S N Karim
- Dr Syeda Noorjahan Karim, Resident, Phase-B, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Salahuddin AZ, Alam MR, Hossain RM, Feroz S, Zannat H, Mondal MC, Roy AS, Robbani MG, Uddin MB, Kadir MS. Renal Involvement as a Presenting Feature of Multiple Myeloma. Mymensingh Med J 2019; 28:527-535. [PMID: 31391422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Renal involvement may be the presenting feature in a vast majority of patients with multiple myeloma and is one of the key for clinical manifestations of symptomatic multiple myeloma. The purpose of the study was to find out the pattern of renal involvement at the time of presentation of multiple myeloma and to explore its association with clinical, laboratory and pathologic features of these cases. This cross sectional study was conducted in the Department of Nephrology at Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh from February 2016 to September 2017. Forty seven (47) patients of newly diagnosed multiple myeloma having renal involvement were included in the study. Multiple myeloma was diagnosed as per criteria proposed by the International Myeloma Working Group, 2003. Renal involvement was considered to be present when any one of proteinuria, microscopic haematuria, renal impairment or urinary tract infection (UTI) was found in the patient. Renal biopsy was done in suitable patients under ultrasound guidance after taking informed written consent. The pattern of renal involvement was detected and status of renal function was assessed and its clinical, laboratory and pathologic associations were analyzed. Data were managed by using computer based software, the Statistical Package for Social Sciences (SPSS) version 23 (IBM Corp.). Median age at presentation was 59 years with the range of 37-76 years. Female (53.2%) was slightly predominant than male (46.8%) and male to female ratio was 1:1.14. Renal impairment, microscopic haematuria, proteinuria, nephrotic range proteinuria, urinary Bence Jones protein and UTI were found in 70%, 19%, 79%, 25%, 19% and 17% of patients respectively. Median serum creatinine and proteinuria were 256μmol/l and 1.24gm/day. Hypercalcaemia and Bence Jones proteinuria were detected in 36% and 27% of patients respectively with renal impairment which were statistically significant. The precipitating factors for renal impairment were NSAIDs use (67%), hyperuricaemia (49%), hypercalcaemia (36%), dehydration (27%), UTI (18%) and no identifiable factor (3%). Dialysis was required in 15% new myeloma patient. Renal biopsy and histopathological examination revealed myeloma cast nephropathy (30%), amyloidosis (30%), glomerulosclerosis (chronic kidney disease) (20%), monoclonal immunoglobulin deposition disease (MIDD) (10%) and interstitial nephritis with fibrosis (10%). Renal involvement was a common and severe complication of multiple myeloma. Renal impairment was strongly associated with hypercalcaemia, NSAIDs use, hyperuricaemia, Bence Jones proteinuria etc.
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Affiliation(s)
- A Z Salahuddin
- Dr Abu Zafor Md Salahuddin, Registrar, Department of Nephrology, Mymensingh Medical College Hospital, Mymensingh, Bangladesh; E-mail:
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Joarder AI, Alam F, Islam MA, Debnath BC, Masud Rana AM, Biswas PK, Khan AS, Karim SS, Uddin MB. Laparoscopic Adrenalectomy: Two Years Experience at Bangabandhu Sheikh Mujib Medical University. Mymensingh Med J 2019; 28:641-646. [PMID: 31391438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Laparoscopic surgery has become an efficient tool for many complex surgical procedures. In last decades, laparoscopic adrenalectomy has become a more viable option for removal of adrenal pathology, with many surgeons preferring it to the conventional open technique. This study was done to evaluate the outcomes of lateral transperitoneal adrenalectomy (LTA) in our department and evaluate the feasibility of lateral transperitoneal adrenalectomy (LTA) in our perspective. This study is case series observational study carried out at Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh from March 2015 to May 2017. Suspected primary adrenal malignancies were excluded. Seventeen (17) patients (10 male and 7 females with mean age of 35.29 years) underwent 18 adrenalectomy (one bilateral). Seventeen (17) adrenal tumours were resected through laparoscopy and one adrenal tumour is resected through open approach due to conversion. All the patients underwent hormonal evaluation, ultrasonogram and computed tomography of whole abdomen. Ten (10) patients (58.82%) had hormonal active adrenal mass. Seven (7) patients (41.18%) were asymptomatic of which 2 had associated cholelithiasis, 7 patients had generalized weakness, 3 had weight gain with Cushing syndrome (one drug induced) and one had Hirsutism with musculanizing effect. Nine (9) patients had hypertension and 6 patients had diabetes mellitus. Eight (8) right, 8 left and 1 bilateral LTA were performed. The mean age of the patients were 35.29 years, adrenal tumour size ranges from 15-65mm and operation time ranges from 75-120 minutes for unilateral adrenalectomies and 220 minutes for bilateral adrenalectomy. Estimated blood loss ranges from 30 to 130 ml in 16 cases and in one case it was 220 ml in which conversion was done. Mean post operative stay in hospital was 3.94 days. In 16 cases no major or minor complications were observed but in one case due to haemorrhage and infiltration of the tumour to kidney conversion are done in the form of right adrenalectomy with upper partial nephrectomy (Histopathology revealed angiomyolipoma). In pathological examination 9 patients (52.94%) had adrenocortical adenoma, 2 patients (11.76%) had phaeochromocytoma including bilateral one, 2 patients (11.76%) had myolipoma of which one converted to open, 2 patients (11.76%) had adrenocortical hyperplasia, one patient (5.88%) had adrenal cyst and one patient (5.88%) had haemorrhagic cyst. LTA is a safe and efficient minimally invasive treatment options for both secreting and non secreting adrenal masses. The procedure has a learning curve and should be performed by a surgeon experienced in both open and laparoscopic adrenal surgery.
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Affiliation(s)
- A I Joarder
- Dr Md Aminul Islam Joarder, Associate Professor, Department of Surgery, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh
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Saha MK, Alam MJ, Karim MR, Kabir SJ, Islam MS, Kamruzzaman M, Paul J, Uddin MB. Results of Locking Compression Plate (LCP) Fixation in Humeral Shaft Nonunion. Mymensingh Med J 2019; 28:515-519. [PMID: 31391420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although nonoperative treatment is indicated & successful for the majority of diaphyseal humeral fractures, nonunion is not rare condition. The prevalence of nonunion as a complication of conservative treatment has been reported to be as high as 15%. Locking compression plate combined with autogenous cancellous bone grafting can result in reliable healing of these humeral nonunion with excellent functional outcome. This prospective observational study was conducted September, 2016 to October, 2018 at National Institute of Traumatulogy & Orthopaedic Rehablitation, Dhaka & Mymensingh Medical College, Mymensingh, Bangladesh. Fifteen (15) patients with non-united humeral shaft fractures were treated by open reduction and internal fixation by LCP with autogenous cancellous bone graft. Detailed clinical conditions of all patients, duration of injury, technical difficulty with the implant, hospital stay period were recorded. Follow up period was 6 months. The patients were evaluated clinically and radiologically for outcomes. The progresses of healing as well as occurrence of complications were recorded. The modified Constant and Murley score of functional assessment was used for shoulder & elbow function. Age of the study patients was ranged 20-50 years. Maximum patients were male 12. Mode of injury were found road traffic accident 8 cases, fall from height 5 cases. Right side was injured in 9 patients. Atrophic nonunion was found in 13 patients and hypertropic in 2 patients. The mean union time was 15 weeks. Only one patient had wound infection and 2 patients had shoulder stiffness. Functional outcome which constituted 90% satisfactory results in 13 cases according to modified Constant & Murley scoring system. Union rate was 100%. Therefore, LCP fixation with autogenous cancellous bone graft is a standard treatment method for nonunion of humeral shaft fracture.
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Affiliation(s)
- M K Saha
- Dr Malay Kumar Saha, Associate Professor, Department of Orthopaedics, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Kamal MZ, Banu NS, Uddin MB, Roy MK, Afreen KF, Mahmud AA. Incidence of Negative Appendicectomy in Clinically Diagnosed Patients of Acute Appendicitis. Mymensingh Med J 2019; 28:536-541. [PMID: 31391423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study was conducted in the department of Surgery, Mymensingh Medical College Hospital, Mymensingh, Bangladesh from January 2016 to December 2017 and performed to assess the negative appendicectomy on histopathology followed by clinically and laboratory investigations based diagnosed acute appendicitis. To perform this prospective study 200 patients with pain in right iliac fossa of both sexes randomly selected and were evaluated by history, clinical examination, laboratory investigations (USG, CBC) and scoring system. Among 200 patients male 124 and female 76 under went appendicectomy 36 were histopathologically normal appendix. Over all negative appendicectomy (NAR) 18%, among them 14.5% (18/124) were male & 23.67% (18/76) were female.
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Affiliation(s)
- M Z Kamal
- Dr Mostofa Zahid Kamal, Senior Consultant (Surgery), Mymensingh Medical College Hospital (MMCH), Mymensingh, Bangladesh; E-mail:
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Ali MS, Khan N, Uddin MB, Hossain MS, Mushtabshirah L. High Transverse Scrotal Incision Orchiopexy for Undescended Testes. Mymensingh Med J 2019; 28:542-546. [PMID: 31391424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bianchi squire first described scrotal incision orchiopexy as an alternative to the traditional approach in the1980s. In maximum premature and some mature infants, palpable testis is a common surgical problem. There are several surgical technique applied to overcome this surgical problems like combined inguinal and scrotal incision or single high transverse scrotal incision. The goal of this study assessed single high transverse scrotal incision for the management of PUT as regards to evaluate operative time, postoperative success and final cosmetic results. One hundred twenty patients were managed at the Paediatric Surgery Department of Mymensingh Medical College Hospital, Mymensingh, Bangladesh with PUT during the period from 2015 to March 2018. We operated all cases between 6 to 12 months and excluded more than 12 months of age and recurrent cases. This technique involves manipulation of the testis down to the scrotum so that it is secured between the thumb and index finger as a fixation is performed. After fixation of testis high transverse scrotal incision was given, all layers were separated. Then enter into inguinal cannel by cutting of external ring. After dissecting the testis come down through the incision. After making dartos pouch through the same incision and orchidopexy done. All infants were followed-up at 1 month, 2 months and 6 months to detect operative times as well as position, testicular atrophy and the final cosmetic appearance. Patient age ranged from 6 months to 12 months. A total of 120 PUTs were operated upon in 100 patients. PUT was bilateral in 15 patients, right-sided in 55 cases and left-sided in 30 cases. Among 120 testes 40 testes were located distal to external inguinal ring (EIR), 70 testes were at internal inguinal ring (IIR) and 10 testes were in between EIR and IIR. A total of 100 patients were successfully placed within scrotum using a single incision. Operative time ranged from 20-36 minutes. There were no cases of testicular atrophy or ascent. The only complications were 3 wound infections (3%), which were successfully treated with antibiotics. Single high transverse scrotal incision was sufficient to deal with PUT especially, in young infants (age 6 months). The procedure results in shorter operative times, similar success and complication rates, and a more cosmetically appealing outcome compared to inguinal orchiopexy.
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Affiliation(s)
- M S Ali
- Dr Mohammad Showkot Ali, Assistant Professor, Department of Paediatric Surgery, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Uddin MB, Roy KR, Hosain SB, Khiste SK, Hill RA, Jois SD, Zhao Y, Tackett AJ, Liu YY. An N 6-methyladenosine at the transited codon 273 of p53 pre-mRNA promotes the expression of R273H mutant protein and drug resistance of cancer cells. Biochem Pharmacol 2018; 160:134-145. [PMID: 30578766 DOI: 10.1016/j.bcp.2018.12.014] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 12/18/2018] [Indexed: 02/06/2023]
Abstract
Mutant p53 proteins that promote cancer cell invasive growth, metastasis and drug resistance emerge as therapeutic targets. Previously, we reported that suppression of ceramide glycosylation restored wild-type p53 protein and tumor suppressing function in cancer cells heterozygously carrying p53 R273H, a hot-spot missense mutation; however, the mechanisms underlying the control of mutant protein expression remain elusive. Herein, we report that an N6-methyladenosine (m6A) at the point-mutated codon 273 (G > A) of p53 pre-mRNA determines the mutant protein expression. Methylation of the transited adenosine was catalyzed by methyltransferase like 3 (METTL3), and this m6A-RNA promoted a preferential pre-mRNA splicing; consequently, the produced p53 R273H mutant protein resulted in acquired multidrug resistance in colon cancer cells. Furthermore, glycosphingolipids (particularly globotriaosylceramide) generated from serial ceramide glycosylation were seen to activate cSrc and β-catenin signaling so as to upregulate METTL3 expression, in turn promoting expression of p53 R273H mutant protein, with consequent drug resistance. Conversely, either silencing METTL3 expression by using small interfering RNA (siRNA) or inhibiting RNA methylation with neplanocin A suppressed m6A formation in p53 pre-mRNA, and substantially increased the level of phosphorylated p53 protein (Ser15) and its function in cells heterozygously carrying the R273H mutation, thereby re-sensitizing these cells to anticancer drugs. Concordantly, suppression of ceramide glycosylation repressed METTL3 expression and m6A formation in p53 pre-mRNA, thus sensitizing cells carrying R273H to anticancer drugs. This study uncovers a novel function of pre-mRNA m6A as a determinant of mutant protein expression in cancer cells heterozygously carrying the TP53 R273H mutation. Suppressing both RNA methylation and ceramide glycosylation might constitute an efficacious and specific approach for targeting TP53 missense mutations coding for a G > A transition, thereby improving cancer treatments.
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Affiliation(s)
- Mohammad B Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Kartik R Roy
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Salman B Hosain
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Sachin K Khiste
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Ronald A Hill
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Seetharama D Jois
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Yunfeng Zhao
- Department of Pharmacology, Toxicology & Neuroscience, Louisiana State University Health Sciences Center, Shreveport, LA 71130, USA
| | - Alan J Tackett
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Yong-Yu Liu
- School of Basic Pharmaceutical and Toxicological Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA.
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Chamcheu JC, Rady I, Chamcheu RCN, Siddique AB, Bloch MB, Banang Mbeumi S, Babatunde AS, Uddin MB, Noubissi FK, Jurutka PW, Liu YY, Spiegelman VS, Whitfield GK, El Sayed KA. Graviola (Annona muricata) Exerts Anti-Proliferative, Anti-Clonogenic and Pro-Apoptotic Effects in Human Non-Melanoma Skin Cancer UW-BCC1 and A431 Cells In Vitro: Involvement of Hedgehog Signaling. Int J Mol Sci 2018; 19:E1791. [PMID: 29914183 PMCID: PMC6032424 DOI: 10.3390/ijms19061791] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/09/2018] [Accepted: 06/12/2018] [Indexed: 11/23/2022] Open
Abstract
Non-melanoma skin cancers (NMSCs) are the leading cause of skin cancer-related morbidity and mortality. Effective strategies are needed to control NMSC occurrence and progression. Non-toxic, plant-derived extracts have been shown to exert multiple anti-cancer effects. Graviola (Annona muricata), a tropical fruit-bearing plant, has been used in traditional medicine against multiple human diseases including cancer. The current study investigated the effects of graviola leaf and stem extract (GLSE) and its solvent-extracted fractions on two human NMSC cell lines, UW-BCC1 and A431. GLSE was found to: (i) dose-dependently suppress UW-BCC1 and A431 cell growth, motility, wound closure, and clonogenicity; (ii) induce G₀/G₁ cell cycle arrest by downregulating cyclin/cdk factors while upregulating cdk inhibitors, and (iii) induce apoptosis as evidenced by cleavage of caspases-3, -8 and PARP. Further, GLSE suppressed levels of activated hedgehog (Hh) pathway components Smo, Gli 1/2, and Shh while inducing SuFu. GLSE also decreased the expression of pro-apoptotic protein Bax while decreasing the expression of the anti-apoptotic protein Bcl-2. We determined that these activities were concentrated in an acetogenin/alkaloid-rich dichloromethane subfraction of GLSE. Our data identify graviola extracts and their constituents as promising sources for new chemopreventive and therapeutic agent(s) to be further developed for the control of NMSCs.
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Affiliation(s)
- Jean Christopher Chamcheu
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, 53706 WI, USA.
| | - Islam Rady
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, 53706 WI, USA.
| | - Roxane-Cherille N Chamcheu
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, Madison, 53706 WI, USA.
- Madison West High School, 30 Ash St, Madison, 53726 WI, USA.
| | - Abu Bakar Siddique
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
| | - Melissa B Bloch
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
| | - Sergette Banang Mbeumi
- Division for Research and Innovation, POHOFI Inc., P.O. Box 44067, Madison, 53744 WI, USA.
| | - Abiola S Babatunde
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
| | - Mohammad B Uddin
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
| | | | - Peter W Jurutka
- School of Mathematical and Natural Sciences, Arizona State University, Phoenix, 85306 AZ, USA.
| | - Yong-Yu Liu
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
| | - Vladimir S Spiegelman
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Pennsylvania State University, College of Medicine, Hershey, 17033 PA, USA.
| | - G Kerr Whitfield
- Department of Basic Medical Sciences, University of Arizona College of Medicine-Phoenix, Phoenix, 85004 AZ, USA.
| | - Khalid A El Sayed
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, College of Health and Pharmaceutic Sciences, University of Louisiana at Monroe, Monroe, 71209-0497 LA, USA.
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Uddin MB, Chow CM, Su SW. Classification methods to detect sleep apnea in adults based on respiratory and oximetry signals: a systematic review. Physiol Meas 2018; 39:03TR01. [DOI: 10.1088/1361-6579/aaafb8] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Hosain SB, Khiste SK, Uddin MB, Vorubindi V, Ingram C, Zhang S, Hill RA, Gu X, Liu YY. Inhibition of glucosylceramide synthase eliminates the oncogenic function of p53 R273H mutant in the epithelial-mesenchymal transition and induced pluripotency of colon cancer cells. Oncotarget 2018; 7:60575-60592. [PMID: 27517620 PMCID: PMC5312403 DOI: 10.18632/oncotarget.11169] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 07/26/2016] [Indexed: 01/06/2023] Open
Abstract
Missense mutation of tumor suppressor p53, which exhibits oncogenic gain-of-function (GOF), not only promotes tumor progression, but also diminishes therapeutic efficacies of cancer treatments. However, it remains unclear how a p53 missense mutant contributes to induced pluripotency of cancer stem cells (CSCs) in tumors exposed to chemotherapeutic agents. More importantly, it may be possible to abrogate the GOF by restoring wild-type p53 activity, thereby overcoming the deleterious effects resulting from heterotetramer formation, which often compromises the efficacies of current approaches being used to reactivate p53 function. Herewith, we report that p53 R273H missense mutant urges cancer cells to spawn CSCs. SW48/TP53 cells, which heterozygously carry the p53 R273H hot-spot mutant (R273H/+, introduced by a CRISPR/Casp9 system), were subchronically exposed to doxorubicin in cell culture and in tumor-bearing mice. We found that p53-R273H (TP53-Dox) cells were drug-resistant and exhibited epithelial-mesenchymal transition (EMT) and increased numbers of CSCs (CD44v6+/CD133+), which resulted in enhanced wound healing and tumor formation. Inhibition of glucosylceramide synthase with d-threo-1-phenyl-2-decanoylamino-3-morpholino-1-propanol (PDMP) sensitized p53-R273H cancer cells and tumor xenografts to doxorubicin treatments. Intriguingly, PDMP treatments restored wild-type p53 expression in heterozygous R273H mutant cells and in tumors, decreasing CSCs and sensitizing cells and tumors to treatments. This study demonstrated that p53-R273H promotes EMT and induced pluripotency of CSCs in cancer cells exposed to doxorubicin, mainly through Zeb1 and β-catenin transcription factors. Our results further indicate that restoration of p53 through inhibition of ceramide glycosylation might be an effective treatment approach for targeting cancers heterozygously harboring TP53 missense mutations.
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Affiliation(s)
- Salman B Hosain
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Sachin K Khiste
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Mohammad B Uddin
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Vindya Vorubindi
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Catherine Ingram
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Sifang Zhang
- Department of Integrated Chinese and Western Medicine, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Ronald A Hill
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
| | - Xin Gu
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA 71130, USA
| | - Yong-Yu Liu
- Department of Basic Pharmaceutical Sciences, University of Louisiana at Monroe, Monroe, LA 71201, USA
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