A pilot study of paclitaxel and carboplatin for recurrent ovarian cancer

Combination chemotherapy with paclitaxel and platinum is the most effective regimen for advanced ovarian cancer. Second-line chemotherapy with paclitaxel (135 mg/m2, 24 h) and carboplatin (AUC 5-6) is also effective for patients who relapse on the same regimen after 6 months or more. However, it has been shown that the same efficacy and less myelosuppression can be achieved with a 3-h infusion of paclitaxel (135 mg/m2), and that dose intensification of carboplatin to an AUC values larger than 4-6 is meaningless. Therefore, we decided to conduct a pilot study of paclitaxel (135 mg/m2, 3 h) and carboplatin (AUC 4-5) for ovarian cancer patients who had relapsed or were resistant to a platinum-containing regimen without paclitaxel. Eligibility criteria included patients with relapsed or resistant ovarian cancer (no specified duration from prior therapy), age 16-75 years, with performance status 0-2, and adequate bone marrow, renal, and hepatic function. Paclitaxel was administered at a fixed dose of 135 mg/m2 followed by one of two carboplatin doses (AUC 4 or 5). Specific doses were alternated between individual patients by the order in which they entered the study. Treatment was repeated every 3 weeks, and more than 4 cycles were administered. A total of 11 patients were enrolled. Carboplatin was administered to 6 patients at an AUC of 4 and to 5 patients at an AUC of 5. The age of patients ranged from 18 to 65 years (median: 54). Other patient data (number of patients): serous (8), non serous (3), patients with measurable disease (9), assessable/CA 125 (3), study drug administration less than 6 months after prior therapy (5), study drug administration 6 months or more after prior therapy (6). Response was defined by CT and CA 125 level. CR was observed in 25% (2/8), PR in 38% (3/8), NC in 25% (2/8), and PD in 13% (1/8) of the patients. The response rate with assessable patients was 100% (3/3), and the overall response rate was 73% (8/11). Two patients with grade 1 tachycardia and grade 4 thrombocytopenia, respectively, refused further treatment after 2 cycles. No other patients experienced grade 4 hematologic toxicity or grade 3 non-hematologic toxicity. The median survival duration after paclitaxel and carboplatin therapy was 21+ months (6-26+ months). This regimen is easy to manage in heavily pretreated patients and seems to have good efficacy. To further assess the efficacy, a phase II study is needed.

Recurrent cerebral embolism in a familial amyloid polyneuropathy patient who received partial liver transplantation from a living donor

Cerebral embolism in relation to cardiac amyloidosis has not been widely noted. A 47-year-old woman who had been suffering from familial amyloid polyneuropathy (FAP) for 7 years was treated with partial liver transplantation from a living donor and her early postoperative course was uneventful. During the 391st to 613th postoperative day she experienced recurrent cerebral infarctions, but clinical examinations revealed no disorders capable of producing cerebral embolism. At autopsy splenic infarction and intracardiac thrombi adhering to the mitral valve and left atrium were found, and these areas showed severe amyloid deposition. Amyloid heart is considered to be one possible cause of systemic embolism.

New 5-HT1A receptor agonists possessing 1,4-benzoxazepine scaffold exhibit highly potent anti-ischemic effects

A series of new 3-substituted-4-(4-aminobutyl)-1,4-benzoxazepin-5(4H)-one derivatives (1-5) which showed a very high affinity for 5-HT1A receptor with good selectivity over dopamine D2 receptor was synthesized. Among these compounds, 3-chloro-4-[4-[4-(2-pyridinyl)-1,2,3,6-tetrahydropyridin-1-yl]butyl]-1,4-benzoxazepin-5(4H)-one (5: SUN N4057) exhibited remarkable neuroprotective activity in a transient middle cerebral artery occlusion (t-MCAO) model.

Expression of vascular endothelial growth factor in human monocyte/macrophages stimulated with lipopolysaccharide

Vascular endothelial growth factor (VEGF) is a mitogen for endothelial cells. We have studied the production of VEGF by human macrophages in response to lipopolysaccharide (LPS). Macrophages stimulated with LPS expressed VEGF mRNA and protein in concentration- and time-dependent manners. The LPS-induced expression of VEGF was inhibited by cycloheximide pretreatment, which suggested that synthesis of certain factor(s) is required for the LPS activity. The induction of VEGF was also suppressed by SB203580, an inhibitor of p38 mitogen-activated protein (MAP) kinase. These results suggest that the LPS-induced VEGF expression depends on the p38-mediated expression of c-Jun, which constitutes the AP-1 complex and binds to the AP-1 site in the VEGF promoter. Pretreatment of the cells with dexamethasone did not affect the LPS-induced upregulation of VEGF mRNA but strongly inhibited VEGF protein production, and the involvement of posttranscriptional regulation on VEGF expression by dexamethasone was suggested. The conditioned medium of LPS-stimulated macrophages enhanced the growth of cultured endothelial cells and it was inhibited by an antibody against VEGF. We conclude that macrophages produce VEGF in response to the stimulation with LPS, which may be partly mediated by the p38 MAP kinase pathway.

Elevations of group II phospholipase A2 concentrations in serum and amniotic fluid in association with preterm labor

OBJECTIVE

The purpose of this study was to determine whether the elevation of secretory group II phospholipase A(2) concentration in the serum and amniotic fluid in preterm labor is associated with intrauterine inflammation.

STUDY DESIGN

Serum and amniotic fluid were collected from women with preterm delivery (<37 weeks' gestation; n = 38) and term delivery (n = 20). Phospholipase activity was measured with a highly sensitive system that was based on reverse-phase high-performance liquid chromatographic separation of 9-anthracenylmethyl derivatives of fatty acids released by phospholipase A(2). The concentrations of immunoreactive isozymes (group I or II) of secretory phospholipase A(2) were assayed with a radioimmunoassay kit with a monoclonal antibody against human pancreatic phospholipase A(2) and splenic IIA phospholipase A(2). Localization of immunoreactive group II phospholipase A(2) in the amniotic membrane was determined by immunostaining visualized with the Vectastain ABC (Vector Laboratories, Inc, Burlingame, Calif) method.

RESULTS

Enzymatic activities of phospholipase A(2) in the serum and amniotic fluid specimens obtained from patients in preterm labor with chorioamnionitis were significantly higher than those in specimens from patients in term labor. Significant elevations of phospholipase A(2) activities were observed in patients with preterm labor without histologically evident chorioamnionitis. The activity of phospholipase A(2) was clearly correlated with the concentration of the immunoreactive group II phospholipase A(2). Group II phospholipase A(2) was localized in amniotic cells obtained from patients with a pathologically determined diagnosis of chorioamnionitis. The predictive value for chorioamnionitis of the group II phospholipase A(2) concentration was relatively higher than the predictive values of the concentrations of C-reactive protein and interleukins 6 and 8.

CONCLUSION

Significant elevations of group II phospholipase A(2) concentrations were detected in the serum and amniotic fluid of women with preterm labor. Group II phospholipase A(2) concentration may be a useful indicator for preterm labor, and phospholipid metabolism is certainly activated both in preterm labor and in apparent inflammatory diseases.

Atherosclerosis and omega-3 fatty acids in the populations of a fishing village and a farming village in Japan

The effect of different dietary habits on atherosclerosis was investigated by examining the content of ordinary diets and relevant risk factors through a mass health survey on two village populations in Japan. In total, 261 inhabitants in the fishing village and 209 in the farming village were examined for body build, blood pressure, and blood chemistry. Information on smoking habits and food consumption was obtained using a semi-quantitative item-frequency questionnaire. Pulse wave velocity of the aorta, intima-media thickness of the carotid artery, and atherosclerotic plaques as obtained by ultrasonography were used as measures of atherosclerosis. All measures of atherosclerosis are lower in the fishing village than in the farming village in both men and women. There is a striking 5-8-fold difference in the number of atherosclerotic plaques (P < 0.0001) between the populations. The observed differences in atherosclerosis parallels differences in dietary habits and differences in the serum essential fatty acids. Evaluation of the omega-3 fatty acids over the combined populations reveals a negative association with the number of plaques in the common carotid while the omega-6 fatty acids shows a weak positive association with plaques.

Increased concentrations of secretory leukocyte protease inhibitor in peritoneal fluid of women with endometriosis

Secretory leukocyte protease inhibitor (SLPI) is a potent inhibitor of human leukocyte elastase. We investigated whether SLPI was present in the peritoneal fluid of women with endometriosis and to clarify the role of SLPI in the pathogenesis of endometriosis. Western blot analyses revealed that SLPI protein was detected as a 12 kDa band in peritoneal fluid. The peritoneal fluid concentrations of SLPI, elastase and interleukin-6 were assayed by enzyme-linked immunosorbent assays (ELISA). SLPI concentrations and the SLPI/elastase ratio in the peritoneal fluid of women with endometriosis were higher than in samples from women without endometriosis. There was no significant correlation between concentrations of SLPI and interleukin-6 in the peritoneal fluid. Immunohistochemistry using an anti-SLPI polyclonal antibody revealed positive staining in peritoneal macrophages, but not lymphocytes. The present findings suggest that SLPI found in the peritoneal fluid of patients with endometriosis may contribute to the pathogenesis of endometriosis.

Phosphorylation of CPI-17, an inhibitor of myosin phosphatase, by protein kinase N

CPI-17 is a phosphorylation-dependent inhibitory protein for smooth muscle myosin phosphate. Phosphorylation at Thr(38), in vitro, by protein kinase C or Rho-kinase enhances the inhibitory potency toward myosin phosphatase. Phosphorylation of CPI-17 by protein kinase N (PKN), a fatty acid- and Rho-activated serine/threonine kinase, and its effect on smooth muscle myosin phosphatase activity were investigated. CPI-17 was phosphorylated by GST-PKN-CAT, a constitutively active GST-fusion fragment of PKN, to 1.46 mol of P/mol of CPI-17, in vitro. The K(m) value of CPI-17 for PKN was 0.96 microM. Phosphorylation of PKN dramatically increased the inhibitory effect of CPI-17 on myosin phosphatase activity. The major and inhibitory phosphorylation site was identified as Thr(38) using a point mutant of CPI-17 and a phosphorylation-state specific antibody. Thus, CPI-17 is a substrate of PKN and might be involved in the Ca(2+) sensitization of smooth muscle contraction as a downstream effector of Rho and/or arachidonic acid.

Oncostatin M is produced during pregnancy by decidual cells and stimulates the release of HCG

Oncostatin M (OSM) is a member of the interleukin-6 superfamily and a multifunctional cytokine that effects the growth and differentiation of many different cell types. OSM concentrations in the sera of pregnant women were found to be significantly higher than those of non-pregnant women. Western blot analysis revealed that the OSM protein was present in the decidua and chorionic tissue in each trimester. Throughout pregnancy, the amount of the OSM protein in the decidua was larger than that in the chorionic tissue. Immunohistochemistry using an anti-OSM monoclonal antibody demonstrated that OSM was mainly localized in the decidual glands and stroma. OSM transcripts in the decidua and the chorionic tissue were detected during each trimester by reverse transcription-polymerase chain reaction (RT-PCR). The regulation of human chorionic gonadotrophin (HCG) release by the placenta in first trimester stimulated with recombinant OSM was also investigated. Stimulation of the placenta by OSM augmented HCG release in a time- and dose-dependent manner. HCG release induced by recombinant human OSM was completely blocked by antibodies against OSM and the signal transducer, gp130, but only partially inhibited by antibodies against the leukaemia inhibiting factor (LIF) receptor. These results suggest that OSM molecules produced by decidual glands and stromal cells during pregnancy have an important role in placental endocrine function.

[Clinical evaluation of hepatic blood flow and oxygen metabolism during thoracoabdominal aortic surgery using pulse dye-densitometry combined with hepatic venous oxygen saturation]

OBJECTIVE

There has been no report that pulse dye-densitometry (PDD), a novel non-invasive modality for monitoring hepatic blood flow (HBF), was applied during cardio-pulmonary bypass (CPB). We investigated weather PDD was useful to measure HBF during thoracoabdominal aortic surgery using partial CPB. Furthermore, HBF and hepatic metabolism were assessed during selective visceral perfusion or shunt using PDD, hepatic venous oxygen saturation (ShO2), and analysis of hepatic metabolic products.

METHODS

A prospective study was carried out in eight patients who underwent thoracoabdominal aortic surgery from April 1998 to October 1999. Operative adjuncts were partial CPB with mild hypothermia in six (femoral veno-arterial bypass: FF group) and deep hypothermic circulatory arrest in two (DHCA group). Measurements were performed at following five time points; just before initiating CPB, just after establishing CPB, during selective visceral perfusion, during selective visceral shunt, and just after weaning CPB.

RESULTS

Plasma clearance rate of indocyanine green measured by PDD well correlated with that obtained by in vitro spectrophotometry (p < 0.0001, R2 = 0.644). PDD demonstrated that decreased IIBF during selective visceral perfusion or shunt was well compensated by increased hepatic oxygen extraction rate in FF group and reduced oxygen consumption in DHCA group. Lactic acid extraction ratio and arterial ketone body ratio also decreased during this period. ShO2 during selective visceral shunt correlated with systemic systolic arterial pressure (SAP), and it showed a marked decrease under 20% when SAP was below 80 mmHg. Postoperative time course of serum total bilirubin and alanine aminotransferase of almost patients were within acceptable limits except the patient who required large amount of homologous blood transfusion.

CONCLUSIONS

PDD proved to be a useful modality that enabled non-invasive monitoring of HBF even during partial CPB. Decreased HBF during selective visceral perfusion or shunt in thoracoabdominal aortic surgery was within physiological compensation, which led us conclude that it might be effective adjuncts, for visceral organ protection.

Lymphocytic interstitial pneumonia: follow-up CT findings in 14 patients

The aim of the present study was to assess the evolution of various computed tomographic (CT) findings of lymphocytic interstitial pneumonia (LIP) with determination of potentially reversible or irreversible features. The study included 14 patients with biopsy-proved LIP who had serial thin-section CT examination 4 to 82 months (median 13 months) apart. Initial and follow-up CT scans were evaluated independently and then directly compared with each other by two observers. The main parenchymal abnormalities on the initial CT scan consisted of ground-glass attenuation (n = 14), thickening of interlobular septa (n = 13), centrilobular nodules (n = 12), cystic airspaces (n = 10), and airspace consolidation (n = 4). On follow-up CT, nine patients improved, one showed no change, and four showed increased extent of disease. With the exception of cysts, the parenchymal opacities were reversible. On follow-up CT, new cysts were seen in three patients; these developed mainly in areas with centrilobular nodules on initial CT. Honeycombing was seen on follow-up CT in four patients; in three patients it developed in areas of airspace consolidation and in one patient it developed in an area with ground-glass attenuation on initial CT. The majority of patients with LIP improved on follow-up. However, airspace consolidation may progress to honeycombing and centrilobular nodules may precede cystic formation.

New target region of allelic loss in hepatocellular carcinomas within a 1-cM interval on chromosome 6q23

BACKGROUND/AIMS

Frequent allelic losses on the long arm of chromosome 16 in several types of human cancers have suggested that 16q harbors one or more genes that are important for suppressing tumorigenesis in the tissues in question.

METHODS

To identify the locations of putative tumor suppressor genes involved in hepatocellular carcinoma, we examined 96 primary hepatocellular carcinomas for their patterns of allelic loss at 18 microsatellite marker loci distributed along this chromosome arm.

RESULTS

Allelic loss at one or more loci was observed in 48 (50%) of these tumors. The highest frequency of loss of heterozygosity (42%) was observed with marker D6S311 on chromosome 6q23. Through detailed deletion mapping of tumors having partial or interstitial deletions, we identified two commonly deleted regions at 6q23 and at 6q26-27.

CONCLUSIONS

The common region at 6q23 lay within a 1-cM interval, flanked by D6S977 and D6S311. The previously documented deletion region that includes the M6P/IGF2R locus was confined to a 20-cM region at band 6q26-27 in our panel of tumors. The location we defined at 6q23 for a putative suppressor of hepatocellular carcinoma has not been reported before.

Unique postural control of upside-down swimming catfish, Synodontis nigriventris, not affected by the change of gravity

In general, most fishes maintain a swimming posture with the dorsal side towards the water surface under normal gravity condition. In contrast to normal fishes, a catfish Synodontis nigriventris, shows a unique postural control. The catfish keeps its posture with the ventral side towards the water surface and the dorsal side towards water bottom under normal gravity. This evidence leads one to assume that the upside-down posture of the catfish is controlled by gravity sensation in a manner different from that of other fishes. However, it has remained unclear to date whether the gravity sensation contributes to the unique postural control of this catfish. We examined its postural control in intact and labyrinth-removed catfish using a clinostat which generates a specific gravity environment (pseudo-microgravity) on earth. In addition, we examined its postural control under microgravity during parabolic flights.

Phosphorylation of CPI-17, an inhibitory phosphoprotein of smooth muscle myosin phosphatase, by Rho-kinase

Phosphorylation of CPI-17 by Rho-associated kinase (Rho-kinase) and its effect on myosin phosphatase (MP) activity were investigated. CPI-17 was phosphorylated by Rho-kinase to 0.92 mol of P/mol of CPI-17 in vitro. The inhibitory phosphorylation site was Thr(38) (as reported previously) and was identified using a point mutant of CPI-17 and a phosphorylation state-specific antibody. Phosphorylation by Rho-kinase dramatically increased the inhibitory effect of CPI-17 on MP activity. Thus, CPI-17 as a substrate of Rho-kinase could be involved in the Ca(2+) sensitization of smooth muscle contraction as a downstream effector of Rho-kinase.

[Sphincter-preserving surgery for lower rectal cancer aimed at improving postoperative bowel function]

Much attention has been focused on sphincter-preserving surgery for patients with lower rectal cancer, leading to renewed interest in the outcome of postoperative bowel function. Some patients who undergo sphincter-preserving surgery experience bowel dysfunction, such as frequent stools, severe constipation, soiling, and incontinence. These symptoms were thought to be correlate with lower resting pressure, lower rectal compliance, sensory disturbance of the anal canal, spasm, and delayed transit in the colon above the anastomosis. To improve postoperative bowel function, reconstruction with the colonic J-pouch has been performed, which results in a satisfactory functional outcome. About 80% of patients with a J-pouch were able to tolerate over 10 minutes after feeling the desire to defecate. An anorectal manometric study showed no abnormal spastic movement of the neorectum and a transit study showed that the J-pouch group was superior to the straight group with respect to the smoothness of movement of radiopaque markers from the cecum to anal ring, although a small number of markers were retained in the colonic J-pouch. Patients who received a colonic J-pouch had fewer defecation problems in daily life. Further study is need to improve postoperative bowel movement in patients who undergo sphincter-preserving surgery.

Identification of a 1-Mb common region at 16q24.1-24.2 deleted in hepatocellular carcinoma

To identify the location of one or more putative tumor suppressor genes that may be involved in hepatocellular carcinoma (HCC), we examined 96 such tumors for their patterns of allelic loss at 21 microsatellite marker loci distributed along chromosome arm 16q. Allelic loss at one or more loci was observed in 58 (60%) of these tumors. Detailed deletion mapping identified a distinct commonly deleted region located within an interval flanked by D16S534 and D16S3091 at 16q24.1-24.2. By constructing a physical map consisting of a YAC contig across the region, the extent of the deleted region was determined to be less than 1 Mb. Among the tumors for which clinical data were available, allelic loss at 16q24.1-24.2 was more frequent in tumors arising from liver cirrhosis compared to HCCs arising from chronic hepatitis (30/42, 71%, vs. 13/33, 39%; P = 0. 0054). Additionally, allelic loss at 16q24.1-24.2 was frequently observed in small tumors and early-stage tumors as well as in tumors of more advanced phenotype.

Inhibition of progressive reduction of islet beta-cell mass in spontaneously diabetic Goto-Kakizaki rats by alpha-glucosidase inhibitor

The Goto-Kakizaki (GK) rat, an animal model of type 2 diabetes, exhibits mild hyperglycemia with a reduction of beta-cell mass. The mechanism for islet structural changes in this model and whether the changes are affected by metabolic control are not known. In the present study, we examined the process of islet changes in male GK rats aged 6, 8, 12, 24, and 36 weeks. Treatment effects with an alpha-glucosidase inhibitor (Voglibose; Takeda, Osaka, Japan) for 24 weeks (12 to 36 weeks of age) were also evaluated. The beta-cell mass increased until 8 weeks of age in both GK and control rats, but the increase was significantly (P < .01) smaller in GK rats versus at 8 weeks of age. Thereafter, the beta-cell mass decreased in GK rats, whereas it remained constant in controls. Voglibose treatment significantly (P < .01) inhibited the reduction of beta-cell mass in GK rats. Proliferative activity of beta cells as measured by bromodeoxyuridine (BrdU) uptake was significantly (P < .05) lower in GK rats versus control rats at 6 and 8 weeks, but the difference disappeared after 12 weeks of age, regardless of Voglibose treatment. The present study thus demonstrates a progressive loss of beta cells in GK rats that was mitigated by Voglibose treatment. We consider that the beta-cell loss in GK rats was due to an early impairment in proliferative activity and reduced survival. Voglibose did not appear to stimulate beta-cell proliferation, but exerted its effect via a reduction of hyperglycemia.

A Clostridium perfringens hem gene cluster contains a cysG(B) homologue that is involved in cobalamin biosynthesis

The hem gene cluster, which consists of hemA, cysG(B), hemC, hemD, hemB, and hemL genes, and encodes enzymes involved in the biosynthetic pathway from glutamyl-tRNA to uroporphyrinogen III, has been identified by the cloning and sequencing of two overlapping DNA fragments from Clostridium perfringens NCTC8237. The deduced amino acid sequence of the N-terminal region of C. perfringens HemD is homologous to those reported for the C-terminal region of Salmonella typhimurium CysG and Clostridium josui HemD. C. perfringens CysG(B) is a predicted 220-residue protein which shows homology to the N-terminal region of S. typhimurium CysG. Disruption of the cysG(B) gene in C. perfringens strain 13 by homologous recombination reduced cobalamin (vitamin B12) levels by a factor of 200. When grown in vitamin B12-deficient medium, the mutant strain showed a four-fold increase in its doubling time compared with that of the wild-type strain, and this effect was counteracted by supplementing the medium with vitamin B12. These results suggest that C. perfringens CysG(B) is involved in the chelation of cobalt to precorrin II as suggested for the CysG(B) domain of S. typhimurium CysG, enabling the synthesis of cobalamin.

Nafamostat mesilate modulates the release of platelet-activating factor during left ventricular assistance with hemofiltration in canine heart failure

OBJECTIVE

The enhanced generation of various chemical mediators is regarded as one of the mechanisms by which severe heart failure progresses to multiple organ failure. Platelet-activating factor is a phospholipid mediator which plays an important role in inflammatory reactions and circulatory shock. We studied the changes in platelet-activating factor levels in a canine heart failure model treated with a left ventricular assist device and hemofiltration, and assessed the effect of a protease inhibitor, nafamostat mesilate.

METHODS

Twenty dogs underwent multiple coronary ligations, and at 2 hours after the ligations they were maintained on left ventricular assist device support with continuous hemofiltration. The animals were divided into two groups: a nafamostat group (n = 10) that received nafamostat mesilate (2 mg/kg/hr), and a control group (n = 10) that received vehicle only.

RESULTS

The blood platelet-activating factor level, before coronary ligations, in the control and nafamostat groups was 2.3 +/- 0.4 and 2.0 +/- 0.7 ng/ml, respectively, and the coronary ligations had little effect on the platelet-activating factor. However, after the initiation of left ventricular assist device, the platelet-activating factor in the control group (5.6 +/- 2.2) was significantly higher (p < 0.05) than that in the nafamostat group (1.1 +/- 0.3). Nafamostat administration was also effective in controlling the increase in the blood lactate level. Hemofiltration did not change the platelet-activating factor.

CONCLUSIONS

We concluded that platelet-activating factor may play a critical role in the development of severe heart failure with left ventricular assistance, and nafamostat administration is likely to be beneficial in such a critical condition by suppressing the platelet-activating factor level.

Distribution of IkappaB proteins in gastric mucosa and other organs of mouse and gerbil

The NF-kappaB/IkappaB complex is a major transcription regulator of inflammatory and immune responses. Helicobacter pylori infection causes chronic inflammation in gastric mucosa by inducing dissociation of the inhibitory IkappaB protein from the complex with a resulting increased expression of interleukin (IL)-8. To clarify which of several known IkappaB proteins could be involved in this inflammatory response, we undertook immunohistochemical examination of normal mouse stomach as well as other murine tissues for comparison, using polyclonal antibodies specific for alpha-, beta-, gamma-, and in-isoforms of IkappaB. The results showed strong immunoreactivity for the alpha-isoform in parietal cells and for the beta-isoform in pit cells of the stomach, along with the presence of these proteins in various other sites. Comparative staining revealed a similar but not identical distribution of IkappaB proteins in the Mongolian gerbil, a rodent model for H. pylori infection. The findings suggest that the alpha- and beta-isoforms are dominant IkappaB proteins in gastric parietal and foveolar cells, respectively, and point to a role for these transcription regulators in modulating pathological responses in stomach and other organs. (J Histochem Cytochem 48:191-199, 2000)