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Font RL, Jay V, Misra RP, Jones DB, Wilhelmus KR. Capnocytophaga keratitis. A clinicopathologic study of three patients, including electron microscopic observations. Ophthalmology 1994; 101:1929-34. [PMID: 7997330 DOI: 10.1016/s0161-6420(94)31081-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Histopathologic studies of this unusual keratitis caused by Capnocytophaga species have not been reported previously. METHODS The authors report the light microscopic and ultrastructural findings of three patients with a distinctive necrotizing keratitis caused by an anaerobic gram-negative bacillus. In three patients, ages 19, 81, and 91 years, a necrotizing stromal keratitis developed; two of these patients had a previous penetrating keratoplasty for pseudophakic bullous keratopathy. The first patient did not have ocular surgery previously and was treated initially for presumed Acanthamoeba keratitis. RESULTS By light microscopy, all three keratectomy specimens were strikingly similar and showed a necrotizing and/or suppurative stromal keratitis displaying myriad slender, fusiform, gram-negative bacilli located anterior to Descemet's membrane and extending into the deep corneal stroma, assuming a "picket fence" appearance. Cultures of the cornea in case 1 grew Capnocytophaga ochracea. For the remaining two patients, a diagnosis presumptively was made based on characteristic histopathologic features. Results of electron microscopic examination showed numerous bacilli that were mostly extracellular; occasional organisms were phagocytosed by macrophages. CONCLUSION The histopathologic features of Capnocytophaga keratitis are unique; therefore, a presumptive diagnosis can be made based on the morphology and location of the bacilli in the keratectomy specimens. To the authors' knowledge, this is the first study describing the typical histopathologic and electron microscopic findings of Capnocytophaga keratitis.
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Misra RP, Bonni A, Miranti CK, Rivera VM, Sheng M, Greenberg ME. L-type voltage-sensitive calcium channel activation stimulates gene expression by a serum response factor-dependent pathway. J Biol Chem 1994; 269:25483-93. [PMID: 7929249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A mechanism by which calcium-induced signals are transduced to the nucleus to activate transcription of the c-fos proto-oncogene has been characterized. The serum response element (SRE), a region of the c-fos gene which controls growth factor-induced transcription, is now shown to mediate c-fos transcription in response to activation of L-type voltage-sensitive calcium channels. Calcium-dependent transcriptional activation through the SRE is mediated by the serum response factor (SRF). Membrane depolarization induces phosphorylation of SRF at Ser-103, an event shown to enhance the ability of SRF to bind the SRE. Ca(2+)-induced SRF phosphorylation occurs via a pathway that may involve Ca2+/calmodulin-dependent kinases.
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Misra RP, Bonni A, Miranti CK, Rivera VM, Sheng M, Greenberg ME. L-type voltage-sensitive calcium channel activation stimulates gene expression by a serum response factor-dependent pathway. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(18)47276-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Bhalwar R, Sandhu HS, Ahuja RC, Singh GK, Misra RP. CLINICO-EPIDEMIOLOGICAL ALGORITHM FOR PREDICTING SYSTEMIC ARTERIAL HYPERTENSION AT HIGH ALTITUDE THROUGH MATHEMATICAL MODELLING. Med J Armed Forces India 1994; 50:175-180. [PMID: 28769197 PMCID: PMC5529756 DOI: 10.1016/s0377-1237(17)31054-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
A population based hybrid design combining element of cohort and cross-sectional approach was used to develop a simple clinical algorithm to predict individual probability of developing hypertension (systolic BP > 140 mm Hg and/or diastolic BP > 90 mmHg). 3615 soldiers initially normotensive at the time of induction into high altitude, were studied by systematic random sampling. Multiple logistic regression analysis showed a high significant association between hypertension and age, body mass index (BMI), tobacco smoking and alcohol consumption. Using the constant/coefficient values obtained from the logistic model and the receiver operating characteristics (ROC) curve analysis, the following predictive rule was developed - To the age in years, add (BMIx 3.86); also add 5.53 if he is a smoker; and add 19.81 if he consumes alcohol. If the total exceeds 142, the individual is at high risk of developing hypertension. This algorithm carries a sensitivity of 68.2% and specificity of 78.5%.
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Kumar S, Kumar R, Singh GK, Arockiasamy J, Misra RP. Meta-analysis. THE NATIONAL MEDICAL JOURNAL OF INDIA 1993; 6:275-8. [PMID: 7950936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Rivera VM, Miranti CK, Misra RP, Ginty DD, Chen RH, Blenis J, Greenberg ME. A growth factor-induced kinase phosphorylates the serum response factor at a site that regulates its DNA-binding activity. Mol Cell Biol 1993; 13:6260-73. [PMID: 8413226 PMCID: PMC364685 DOI: 10.1128/mcb.13.10.6260-6273.1993] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A signaling pathway by which growth factors may induce transcription of the c-fos proto-oncogene has been characterized. Growth factor stimulation of quiescent fibroblasts activates a protein kinase cascade that leads to the rapid and transient phosphorylation of the serum response factor (SRF), a regulator of c-fos transcription. The in vivo kinetics of SRF phosphorylation and dephosphorylation parallel the activation and subsequent repression of c-fos transcription, suggesting that this phosphorylation event plays a critical role in the control of c-fos expression. The ribosomal S6 kinase pp90rsk, a growth factor-inducible kinase, phosphorylates SRF in vitro at serine 103, the site that becomes newly phosphorylated upon growth factor stimulation in vivo. Phosphorylation of serine 103 significantly enhances the affinity and rate with which SRF associates with its binding site, the serum response element, within the c-fos promoter. These results suggest a model in which the growth factor-induced phosphorylation of SRF at serine 103 contributes to the activation of c-fos transcription by facilitating the formation of an active transcription complex at the serum response element.
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Au YK, Reynolds MD, Chadalavada R, Misra RP. Bipolar cautery and internal thermal sclerostomy in a rabbit model. OPHTHALMIC SURGERY 1992; 23:188-91. [PMID: 1574288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Internal thermal sclerostomy (ITS) was performed unilaterally in 35 adult New Zealand rabbits using a pinpoint bipolar cautery probe and radio-frequency power supply, with the nonoperated eyes serving as controls. Standard trabeculectomy using a limbal-based flap was also performed on 10 additional rabbits, and served as a second bench mark for comparison with the ITS technique. Intraocular pressure (IOP) was measured in all eyes preoperatively and on postoperative days 2, 4, 6, and 8. A significant (P = .005) difference between the reduction in IOP in the ITS eyes and in the control eyes was found up to postoperative day 8; on that day the reduction in IOP was 5.2 mm Hg. IOP in the eyes undergoing standard trabeculectomy was significantly (P = .05) reduced up to postoperative day 2, and gradually decreased, to 2.5 mm Hg, on postoperative day 8. The greatest reduction in IOP (2.9 mm Hg) for these eyes also occurred on postoperative day 2. Complications of ITS included iris burn (23%), peripheral corneal edema (17%), and iritis (9%). No ruptured blebs, flat anterior chambers, hyphemas, or lens damage occurred. The potential advantages of the ITS procedure using the bipolar cautery probe include a decreased risk of cataract formation because of the curved probe design. The procedure is also technically simple to perform and requires only inexpensive and readily-available equipment.
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Misra RP, Rivera VM, Wang JM, Fan PD, Greenberg ME. The serum response factor is extensively modified by phosphorylation following its synthesis in serum-stimulated fibroblasts. Mol Cell Biol 1991; 11:4545-54. [PMID: 1875937 PMCID: PMC361330 DOI: 10.1128/mcb.11.9.4545-4554.1991] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Growth factor regulation of c-fos proto-oncogene transcription is mediated by a 20-bp region of dyad symmetry, termed the serum response element. The inner core of this element binds a 67-kDa phosphoprotein, the serum response factor (SRF), that is thought to play a pivotal role in the c-fos transcriptional response. To investigate the mechanism by which SRF regulates c-fos expression, we generated polyclonal anti-SRF antibodies and used these antibodies to analyze the biochemical properties of SRF. These studies indicate that the synthesis of SRF is transient, occurring within 30 min to 4 h after serum stimulation of quiescent fibroblasts. Newly synthesized SRF is transported to the nucleus, where it is increasingly modified by phosphorylation during progression through the cell cycle. Within 2 h of serum stimulation, differentially modified forms of SRF can be distinguished on the basis of the ability to bind a synthetic serum response element. SRF protein exhibits a half-life of greater than 12 h and is predominantly nuclear, with no change occurring in its localization upon serum stimulation. We find that the induction of SRF synthesis is regulated at the transcriptional level and that cytoplasmic SRF mRNA is transiently expressed with somewhat delayed kinetics compared with c-fos mRNA expression. These features of SRF expression suggest a model whereby newly synthesized SRF functions in the shutoff of c-fos transcription.
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Klotz SA, Misra RP, Butrus SI. Contact lens wear enhances adherence of Pseudomonas aeruginosa and binding of lectins to the cornea. Cornea 1990; 9:266-70. [PMID: 2115422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Extended wear soft contact lenses are associated with an increased incidence of Pseudomonas aeruginosa keratitis. Because the first step in the pathogenesis of this disease is adherence of the microorganism to the corneal surface, we studied the effect of soft contact lens wear on the adherence of P. aeruginosa to the cornea. Rabbits were fitted for extended wear soft contact lenses in the left eye, and the right eye served as a control. Both eyes were then closed with a partial tarsorrhaphy. After 1-5 days of wear, the lenses were removed and the corneas of the left and right eye were removed. Differences in the number of adherent Pseudomonas and in lectin binding to lens-wearing corneas and non-lens-wearing corneas were determined. After 1, 3, and 5 days of soft contact lens wear, there was a significant increase in the number of P. aeruginosa adherent to the lens-wearing cornea. Three to eight times as many bacteria adhered to the lens-wearing eye as compared with the control eye (p less than 0.05). In addition, a soft contact lens placed in the eye followed by the immediate application of P. aeruginosa resulted in an eightfold increase in adherence of bacteria to the lens-wearing cornea (p less than 0.05). Lens wear also led to an increase in binding of concanavalin A (Con A), wheat germ agglutinin (WGA), and Maclura pomifera agglutinin (MPA) to surface epithelium covered by the lens. These corneal epithelial changes induced by extended wear soft contact lenses may provide some insight as to why soft contact lens wearers are predisposed to Pseudomonas keratitis.
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Morris DM, Haskins R, Marino AA, Misra RP, Rogers S, Fronczak S, Albright JA. Use of carbon fibers for repair of abdominal-wall defects in rats. Surgery 1990; 107:627-31. [PMID: 2141192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Carbon in the form of 8-micron fibers induces growth of connective tissue. The purpose of this study was to measure and histologically characterize tissue ingrowth occurring in carbon fibers implanted for up to 12 months in abdominal-wall defects in rats, compared with polypropylene mesh. Carbon fibers induced significantly more tissue ingrowth than polypropylene mesh at 6 to 12 months postoperatively. The predominant tissues associated with carbon fibers and polypropylene mesh were dense connective tissue and fat, respectively. Fragmentation of the implants did not occur, and implant debris was not found in the regional lymph nodes. Carbon fibers are potentially useful for reinforcing abdominal-wall defects.
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Klotz SA, Harrison JL, Misra RP. Aggregated platelets enhance adherence of Candida yeasts to endothelium. J Infect Dis 1989; 160:669-77. [PMID: 2677163 DOI: 10.1093/infdis/160.4.669] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The adherence of Candida albicans yeasts to human umbilical vein endothelium to subendothelial extracellular matrix (ECM) was investigated. Yeasts added to confluent endothelium in citrated platelet-poor plasma adhered on the average of 1 colony forming unit (cfu) per culture well. When platelets were added as platelet-rich plasma, a significant increase of yeast adherence was not seen. However, when endothelium was contracted by treatment with 2 mM EDTA, resulting in exposure of ECM, yeast adherence was increased to 10 cfu/well. When platelets were added with these yeasts, the number of adhering yeasts was further increased to 23 cfu/well (P less than .01). This represented an increase in adherence of yeasts of 230%. When the endothelial cells were completely removed and ECM exposed, platelets were found to likewise augment yeast adherence. Platelets, when added to the ECM, formed aggregates to which the yeasts firmly adhered. Likewise, when platelets were aggregated by adenosine diphosphate and mixed with yeasts, yeasts were shown to bind avidly to aggregated platelets, whereas yeasts did not adhere to unactivated, discoid platelets. Thus, exposed subendothelial ECM induces the aggregation of platelets and yeasts bind avidly to these platelet aggregates.
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Mahjoub SB, Ganley JP, Misra RP, Langford MP. Isolation of a herpes simplex virus type 2 that is retinovirulent in mice. Curr Eye Res 1989; 8:687-95. [PMID: 2551573 DOI: 10.3109/02713688909025803] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The virulence of a herpes simplex virus type 2 (HSV-2) isolated from the urine of a patient (SL) with acquired immunodeficiency syndrome (AIDS) and bilateral acute retinal necrosis (ARN), was investigated in mice. The ratio of plaque forming units (PFU) in fibroblasts to the 50% lethal dose (LD50) of HSV-2(SL) in mice was 10 fold more than the PFU to LD50 ratio of a neurovirulent HSV-2, strain 186. Further, HSV-2(SL) caused retinitis with and without lethal encephalitis in mice inoculated intracranially (i.c.). In contrast, mice inoculated with HSV-2(186) died of encephalitis without ocular disease. HSV-2(SL) was isolated from eye and/or brain tissue 1 to 15 days post i.c. inoculation. Ocular disease progressed from an initial mild chorioretinitis on day 8 to total retinal necrosis with panuveitis by day 11 in mice given 10 PFU of HSV-2(SL) i.c. HSV antigen was detected initially in the cells of the optic nerve and spread into the ganglial cells of the nerve fiber layer, the neurosensory cells of the inner nuclear layer, and the cells of the retinal pigment epithelium (RPE) between days 8 and 10. Thus, this study supports the concept that HSV neurovirulence varies between strains and presents a HSV-2 neurotransmission animal model of ARN.
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Klotz SA, Au YK, Misra RP. A partial-thickness epithelial defect increases the adherence of Pseudomonas aeruginosa to the cornea. Invest Ophthalmol Vis Sci 1989; 30:1069-74. [PMID: 2499555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Some patients with infectious keratitis have no clinically demonstrable corneal abrasion predisposing them to infection. Subtle, undetectable corneal injuries may facilitate bacterial adherence to the cornea, eventually leading to keratitis. To study this concept, we have developed a rabbit model in which a partial-thickness corneal epithelial defect was induced by filter paper impression on the cornea that removed one to two layers of corneal epithelium. Following this injury, the corneas were incubated with Pseudomonas aeruginosa, washed, and the number of bacteria adhering to the injured corneas as well as to control corneas was quantitated. Corneas treated with filter paper, either ex vivo or in vivo, allowed 20 times more bacteria to adhere than did the untreated control corneas (P less than 0.01). This superficial epithelial defect increased Pseudomonas adherence to the cornea for up to 72 hr after injury. When corneal injury was extended to the stroma, the adherence of Pseudomonas was further augmented as compared to adherence to the superficially injured cornea. Thus, we conclude that a clinically subtle, partial-thickness corneal epithelial injury can markedly facilitate the adherence of Pseudomonas aeruginosa, which may be an important predisposing factor for infectious keratitis.
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Klotz SA, Butrus SI, Misra RP, Osato MS. The contribution of bacterial surface hydrophobicity to the process of adherence of Pseudomonas aeruginosa to hydrophilic contact lenses. Curr Eye Res 1989; 8:195-202. [PMID: 2496954 DOI: 10.3109/02713688908995192] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ten isolates of Pseudomonas aeruginosa obtained from the corneas of patients with Pseudomonas keratitis adhered to soft contact lenses in significantly greater numbers than did six isolates from other body sites (P less than .05). However, there was no predominant serotype among the 10 corneal isolates tested. Isolates grown statically in broth at 37 degrees C formed a pellicle and adhered two times as much to contact lenses as did isolates grown in broth while shaking which did not form a pellicle (P less than .01). The more adherent isolates (grown at 37 degrees C) were shown to be more hydrophobic than the less adherent bacteria (grown at 26 degrees C) by their propensity to accumulate at the interface between hexadecane and saline and their movement into polyethylene glycol from dextran. These corneal isolates agglutinated erythrocytes, a process that was inhibited by dilute solutions (as low as 0.01%) of three commonly used surfactants. These same surfactants inhibited the adherence of Pseudomonas aeruginosa to soft contact lens surfaces by as much as 52%. It is concluded that hydrophobic interactions may significantly contribute to the ability of Pseudomonas aeruginosa to adhere to contact lenses.
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Ampil FL, Misra RP. Factors influencing survival of patients with adenoid cystic carcinoma of the salivary glands. J Oral Maxillofac Surg 1987; 45:1005-10. [PMID: 2826732 DOI: 10.1016/0278-2391(87)90154-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The uncertain long-term cure of adenoid cystic carcinoma of the salivary glands was determined in 30 treated patients seen between 1952 to 1984. Ten of 25 patients received elective postoperative irradiation (SEPI) after surgical extirpation of the primary/recurrent lesion; five patients had definitive radiotherapy alone. Overall, survival rates were 60%, 30%, and 7% at five, 10, and 20 years, respectively. The incidence of local recurrence was 37%, regional recurrence 3%, and distant metastasis 37%. Fewer recurrences and distant metastases were in the SEPI group than the surgery alone group. The majority of failures occurred within 10 years after initial diagnosis of primary malignancy; most of the patients died within five years after failure(s) detection. Correlations of prognosis to site of origin, and local control to total radiotherapy dose were observed. It is concluded that cure of disease can be achieved with the use of appropriate therapy.
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Abstract
The adherence of Pseudomonas aeruginosa to extended-wear soft contact lenses (EWSCLs) may be an important initial step in the pathogenesis of EWSCL-associated infectious keratitis. P. aeruginosa tend to adhere more to worn EWSCLs than unworn EWSCLs (P less than 0.05). Normal tear components such as aqueous solutions of albumin, lysozyme, and lactoferrin all significantly enhance adherence of P. aeruginosa to unworn EWSCLs often by as much as 300%. The presence of a 1% solution of sialic acid in the bathing medium significantly reduces the adherence of P. aeruginosa to both unworn and worn lenses. Inhibition of bacterial adherence could also be achieved with the addition of mucin (which contains terminal sialic acid residues in its major sugar chains). Therefore, selective adherence by P. aeruginosa to a specific sugar (sialic acid) may be important in the initial attachment of the bacterium to soft contact lenses.
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Klotz SA, Misra RP, Butrus SI. Carbohydrate deposits on the surfaces of worn extended-wear soft contact lenses. ARCHIVES OF OPHTHALMOLOGY (CHICAGO, ILL. : 1960) 1987; 105:974-7. [PMID: 3475046 DOI: 10.1001/archopht.1987.01060070118039] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Three different commercial extended-wear soft contact lenses worn continuously by patients for at least 28 days were stained with fluorescein isothiocyanate-labeled lectins. These lectins detected the presence of alpha-linked or beta-linked D-mannose, D-glucose, D-galactose, L-fucose, N-acetyl-D-glucosamine, N-acetyl-D-galactosamine, and N-acetyl neuraminic acid (sialic acid) on the surfaces of the contact lenses. These saccharides are bound to other sugars that likely account for an integral part of glycoprotein and/or glycolipid deposits on lens surfaces. These tear deposits may contribute to the chemical spoilage of the lens and, furthermore, may serve as specific receptors for pathogenic microorganisms commonly implicated in extended-wear soft contact lens-associated infectious keratitis.
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Ampil FL, Misra RP. Malignant lymphoma of the salivary gland: case reports and review of the literature. RADIATION MEDICINE 1987; 5:20-6. [PMID: 3306807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Six cases of malignant lymphoma with unusual presentation in the salivary gland are reported here. In all subjects (except one), the lesion was located in the parotid gland. After further investigation and in accordance with the Ann Arbor staging system, patients' disease stages were I (1), II (3), III (1), and IV (1). Following the establishment of diagnosis through either tumor biopsy or resection, radiotherapy was given for early (I-II) and chemotherapy for more advanced (III-IV) stages of malignancy. With an average follow-up period of 27 months, overall 33% (2/6) survival and 67% (4/6) local control rates were observed. The literature is reviewed with consideration of clinicopathologic features and results of applied treatment.
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Benzel EC, King JW, Mirfakhraee M, West BC, Misra RP, Hadden TA. Blastomycotic meningitis. SURGICAL NEUROLOGY 1986; 26:192-6. [PMID: 3726746 DOI: 10.1016/0090-3019(86)90376-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A difficult and tragic case of central nervous system blastomycosis is presented as the basis for a review of the diagnostic criteria required to establish this diagnosis and to present a scheme for the diagnosis and therapy of chronic meningitis. The diagnosis in our case was complicated by preexisting inadequately treated tuberculosis; a prepontine mass; and a cervical intradural, extramedullary, circumferential mass. This exceptional case of chronic basilar meningitis with cervical myelopathy was caused by Blastomyces dermatitidis.
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Pickering JW, Misra RP. Human monoclonal antibodies to cytokeratins associated with squamous cell carcinoma. CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY 1984; 32:253-60. [PMID: 6203675 DOI: 10.1016/0090-1229(84)90126-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Human lymphocytes from a lymph node draining the tumor-bearing area of a patient with a large primary squamous cell carcinoma of the oral mucosa were fused with the nonproducer mouse myeloma, NS-1, to produce interspecies hybridomas. Of 95 hybridoma culture supernatants tested, 23 contained from 0.5 to 50 micrograms/ml of human IgM or IgG. Six supernatant fluids containing greater than 15 micrograms/ml of Ig were tested by indirect immunoperoxidase and immunofluorescence against sections of the autologous carcinoma. Five IgM (lambda) monoclonal antibodies stained the cytoplasm of autologous and allogeneic squamous carcinoma cells. All five monoclonal antibodies stained all layers of normal epidermis but each antibody stained the superficial keratin layer most intensely. Two of the five hybridoma antibodies were further tested. Both antibodies stained all types of normal epithelium; a network of fibers characteristic of intermediate filaments in cultured squamous carcinoma cells and cultured fibroblasts; Z lines in skeletal muscle; and axons in peripheral nerve fibers. We conclude that all five IgM monoclonal antibodies recognize cytokeratins associated with the autologous squamous cell carcinoma. Two of the five hybridoma antibodies recognize an antigenic determinant common to all types of intermediate filament proteins. These data indicate that cytokeratins released by squamous carcinoma cells induced an antibody response in this patient.
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Abstract
Pure intrarenal lipomas of sufficient size to be of surgical significance are among the rarest of renal tumors. A review of the literature to date revealed only 17 cases reported previously that met the histologic requirements of a pure intrarenal lipoma. We report an additional case in which the large tumor became clinically apparent following blunt trauma and rupture.
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Abstract
While prostatic adenocarcinoma is associated classically with osseous or lymphatic metastasis, it can present clinically with protean manifestations. We describe 4 cases that demonstrate unusual patterns of metastatic spread, including isolated supraclavicular mass, pleural effusion, suprapubic and genital skin metastasis, and priapism. Newer immunohistochemical staining techniques for prostate specific antigen and prostatic acid phosphatase can assist in localization of the metastatic adenocarcinoma to a prostatic origin.
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Misra RP, Muench KF, Humayun MZ. Covalent and noncovalent interactions of aflatoxin with defined deoxyribonucleic acid sequences. Biochemistry 1983; 22:3351-9. [PMID: 6412744 DOI: 10.1021/bi00283a008] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Lanehart WH, Sanusi ID, Misra RP, O'Neal B. Metastasizing basal cell carcinoma originating in a stasis ulcer in a black woman. ARCHIVES OF DERMATOLOGY 1983; 119:587-591. [PMID: 6859901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A case of basal cell carcinoma originated in a long-standing stasis ulcer on the lower extremity and then metastasized to the dermis and subcutaneous tissue of the thigh. The literature on metastasizing basal cell carcinoma is reviewed.
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Misra RP, El-agraa O. Urbanization and national development: the quest for appropriate human settlement policies in the Arab world. EKISTICS; REVIEWS ON THE PROBLEMS AND SCIENCE OF HUMAN SETTLEMENTS 1983; 50:210-8. [PMID: 12279624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
"The subject matter of this paper is policy perspectives of human settlement of the Arab countries in the light of the rapid urbanization trends largely resulting from the economic growth of the last two decades or so.... Section A analyzes the human settlement structure of the Arab countries and the urbanization processes of the recent past, and Section B picks up the threads from various documents and field observation to see what certain countries have done to solve the emerging problems and what directions their policies might take in the future." The paper is based on aggregate national data for 20 countries and on case studies of Egypt, Iraq, Jordan, Sudan, and Tunisia.
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